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Science & Tech > Other Life > Marine


Now updated for CSW15. New words, if any, and new inflections of existing words, are shown in red.


acaleph (Greek) a kind of jellyfish.
acalephae a class of jellyfish which includes the medusae.
acalephan (Of or like) an acaleph, a kind of jellyfish.
acalephe (Greek) a kind of jellyfish.
actinia (Lat.) a sea anemone of the genus Actinia; loosely any sea anemone.
actinian a sea anemone of the genus Actinia; loosely any sea anemone.
actinopod any protozoan of the phylum Actinopoda, such as a radiolarian or a heliozoan, having stiff radiating cytoplasmic projections.
actinozoan belonging to the class Anthozoa of marine coelenterates.
aequorin a kind of jellyfish.
alcyonarian a member of the Alcyonaria, the order to which sea-pens, red coral and organ-pipe coral belong.
anthozoan any animal of the class Anthozoa of marine coelenterates, which includes sea anemones, corals, and sea-pens.
anthozoic of or like an anthozoan, any animal of the class Anthozoa of marine coelenterates.
arrowworm a peculiar transparent worm of the genus Sagitta, living at the surface of the sea.
ascidian a sea-squirt or tunicate.
ascon a type of sponge.
asconoid like an ascon, a type of sponge.
asterid a starfish.
asteridian a starfish.
asteroidean an echinoderm of the class Asteroidea, comprising the starfishes.
aurelia (Ital.) a jellyfish of genus Aurelia.
bipinnaria the larva of certain starfishes as developed in the free-swimming stage.
chaetognath a kind of marine worm.
chaetopod a member of the Chaetopoda, bristle-worms.
chondrophore a medusoid hydrozoan that resembles a jellyfish.
chondrophorine a member of the Chondrophora, a suborder of hydrozoans similar to medusae but with a different internal structure.
clamworm a marine worm.
cnidarian a coelenterate, that includes sea anemones, hydra, jellyfish, and coral.
coelenterate a classification of animals that includes sea anemones, hydra, jellyfish, and coral.
coenosteum the calcareous skeleton of a coral colony.
comatula (Lat.) a type of crinoid, aka feather star.
comatulid a type of crinoid, aka feather star.
copperworm the shipworm.
coral a mass of marine animal skeletons.
coralline a marine animal, esp a bryozoan, which lives in colonies resembling coral.
corallum (Lat.) the coral or skeleton of a zoophyte.
cormidium (Lat.) an aggregation of polyps in a colonial marine hydrozoan.
crinoid a family of marine creatures, the sea lilies and feather stars.
crinoidal of or like a crinoid, a family of marine creatures.
crinoidean like a crinoid; (noun) a crinoid.
crossfish another name for the common sea urchin.
ctenophoran a member of the Ctenophora, transparent, free-swimming marine organisms resembling jellyfishes.
ctenophore a marine animal with comblike cilia.
dinoflagellate a kind of marine protozoan, one of the principal constituents of plankton.
discomedusan a member of the Discomedusae, an order of jellyfishes with flattened umbrella.
discophoran a jellyfish.
discophorous relating to the Discophora, an order of jellyfish.
echinoderm one of the Echinodermata, starfishes, sand dollars, sea urchins, and sea cucumbers.
echinodermal of or like an echinoderm.
echinodermatous of or like an echinoderm.
echinoid an echinoderm of the class Echinoidea, a sea urchin.
echinus (Lat.) a sea-urchin.
echiuran one of the Echiura, a phylum of marine invertebrates, aka spoonworms.
gastraea a hypothetical ancestor of the Metazoa, sponges etc.
gastrea a hypothetical ancestor of the Metazoa, sponges etc.
globigerina a minute marine invertebrate of the genus Globigerina, with a calcareous shell of globose chambers in a spiral.
gorgonian any of various horny corals of the order Gorgonacea, with upright, plantlike forms.
haliplankton plankton living in sea water.
hexact six-rayed; (noun) a six-rayed creature.
hexactinellid a kind of six-rayed sponge.
holoplankton organisms which remain as plankton throughout their whole life cycle.
holothurian any member of a class of wormlike unarmoured echinoderms, aka sea cucumbers.
hornwrack a bryozoan of the genus Flustra.
hyalonema a genus of sponges, aka glass-rope sponge.
hydra (Lat.) a freshwater hydrozoon of the genus Hydra.
hydrocoral any hydrozoan coelenterate of an order which includes the millepores.
hydrocoralline relating to an order of Hydrozoa, millepores, etc; (noun) a member the Hydrozoa.
hydroid related to, or resembling, a hydra; (noun) a creature related to, or resembling, the hydra.
hydromedusa a hydrozoan in its medusoid stage.
hydromedusan a hydromedusa.
hydromedusoid a hydromedusa.
hydropolyp a hydrozoan polyp.
hydrosoma all the zooids of a hydroid colony collectively.
hydrosomal relating to a hydrosoma, a hydroid colony.
hydrosomatous of or like hydrosomata.
hydrosome all the zooids of a hydroid colony collectively.
hydrozoan any coelenterate of the class Hydrozoa, comprising organisms that are mostly marine and colonial with polyp and medusoid stages in the life cycle.
hydrozoon any coelenterate of the class Hydrozoa, comprising organisms that are mostly marine and colonial with polyp and medusoid stages in the life cycle.
irukandji a very venomous jellyfish found mainly near Australia.
jellyfish a marine coelenterate with jellylike body.
leucon a sponge of complex structure.
limulus (Lat.) a horseshoe crab.
lithistid any of the Lithistida, hard stony sponges.
longworm as in sea longworm, a kind of marine worm.
madreporal relating to madrepore, a kind of coral.
madrepore a coral of the common reef-building type, occurring esp in tropical seas.
madreporian a coral, a madrepore.
madreporic relating to madrepore, a kind of coral.
medusa (Lat.) a kind of jellyfish.
medusal relating to a medusa, a kind of jellyfish.
medusan relating to a medusa, a kind of jellyfish; (noun) a jellyfish.
medusiform resembling a jellyfish.
medusoid like a medusa; (noun) a sexual hydrozoan that remains attached to the parent hydroid colony.
meroplankton plankton consisting of certain larvae that do not spend all their life as plankton.
microplankton very small plankton.
millepore any of a group or order of colonial hydrozoans.
monaxon a monaxonic sponge or spicule.
nannoplankton very small plankton.
nanoplankton very small plankton.
nectocalyx the swimming bell or umbrella of a jellyfish of medusa.
nematophore a mouthless type of hydrozoan polyp.
neustic of or like neuston, minute organisms floating or swimming on water's surface.
neuston (Ger.) the aggregate of minute aquatic organisms that inhabit the surface of a body of water.
neustonic of or like neuston, minute organisms floating or swimming on water's surface.
noctiluca (Lat.) a roughly spherical marine dinoflagellate of the genus Noctiluca, which is strongly phosphorescent.
obelia any of a genus of small marine colonial hydroids.
ophiura a member of the Ophiura genus of brittle-stars or sand-stars.
ophiuran a member of the Ophiura genus of brittle-stars or sand-stars.
ophiurid a member of the Ophiura genus of brittle-stars or sand-stars.
ophiuroid a member of the Ophiura genus of brittle-stars or sand-stars.
palolo (Samoan) a type of seaworm, found in the Pacific.
parazoan any member of the Parazoa, a sponge.
parazoon any member of the Parazoa, sponges.
pennatula a sea-pen.
pentacrinoid a young form of some crinoids that resembles Pentacrinus.
peridinian a dinoflagellate, a kind of marine protozoan.
peridinium a dinoflagellate, a kind of marine protozoan.
phoronid a wormlike marine animal.
physalia a genus of large oceanic Siphonophora which includes the Portuguese man-of-war.
phytoplankton vegetable plankton, that includes diatoms, desmids, and dinoflagellates.
phytoplanktonic relating to phytoplankton.
plankter an individual in plankton.
planktic relating to plankton.
plankton tiny, free-floating organisms of the ocean or other aquatic systems.
planktonic relating to plankton.
planoblast any free-swimming gonophore of a hydroid; a hydroid medusa.
plumularian a member of the Plumularia, a kind of Hydrozoa.
pluteal of or pertaining to a pluteus, the free-swimming larva of sea urchins and ophiurans.
pluteus (Lat.) a sea-urchin or brittle-star larva.
pogonophoran any of a phylum Pogonophora of marine wormlike animals.
polychaete a type of aquatic worm (including lugworms and ragworms).
polychete a type of aquatic worm (including lugworms and ragworms).
polyparium the framework and base of a polyp colony, esp coral.
polypary the framework and base of a polyp colony, esp coral.
polypide a polyp of a colonial animal.
polypidom a coral, or corallum; also, one of the coral-like structure made by bryozoans and hydroids.
polypine of or like a (colonial) polyp.
polypite a polyp of a colonial animal.
polyzooid like or of the nature of a polyzoon.
polyzoon one of the individual zooids forming the compound organism of a polyzoan.
porifer (Lat.) a member of the Porifera, the sponges.
poriferal relating to the Porifera, sponges.
poriferan relating to the Porifera, sponges; (noun) a member of the sponge family.
pycnogonid one of the Pycnogonida, sea-spiders.
pycnogonoid of or like a pycnogonid, a sea-spider.
pyrosome any of a genus of compound tunicates, with brilliant phosphorence.
rhabdosphere an aggregation of rhabdoliths in oceanic ooze.
rhizocaul the rootlike stalk of a hydrozoan colony.
sabella (Lat.) a genus of tubicolous annelids having a circle of plumose gills around the head.
salp any member of a genus of oceanic tunicates.
salpa any member of a genus of oceanic tunicates.
salpian any member of a genus of oceanic tunicates.
salpid any member of a genus of oceanic tunicates.
sarcenchymatous of or like a sarcenchyme, a soft tissue of sponges with close-packed cells and reduced gelatinous matrix.
sarcenchyme a soft tissue of sponges with close-packed cells and reduced gelatinous matrix.
scyphozoan any of a class of medusoid coelenterates; a jelly fish.
seaworm any marine worm.
serpula a member of a genus of marine annelids or tubeworms.
serpulid a marine polychaete worm.
sertularian a colonial hydroid with polyps arranged in pairs.
seston (Ger.) a very small plankton organism.
siphonophore a marine creature, colonial in habit.
siphonophorous of or like a siphonophore, a type of colonial hydrozoan.
sipunculid a kind of marine worm with a retractile proboscis.
sipunculoid a kind of marine worm with a retractile proboscis.
spatangoid a heart urchin, a member of the Spangoidea, an order of more or less heart-shaped sea urchins with eccentric anus.
spoonworm a marine invertebrate of the phylum Echiura with a spoon-like mouthpiece.
starfish a star-shaped marine animal.
stellerid a starfish.
stelleridan a starfish.
stomatopod one of the Stomatopoda, marine crustaceans, including the squilla.
strobila (Lat.) a stack of immature larval jellyfish formed on a scyphistoma by budding.
strobilar of or like a strobila, a stack of immature larval jellyfish.
sunstar a kind of starfish.
sycon a type of sponge.
syconoid of or like a sycon, a type of sponge.
tetraxon a sponge spicule with four axes.
trepang (Malay) a sea cucumber eaten as a Chinese or Japanese delicacy.
triaxon a triaxial sponge spicule.
trochophore a free-swimming pelagic form of many invertebrates.
trochosphere a free-swimming pelagic form of many invertebrates.
tubularian any hydroid belonging to the suborder Tubularida.
tunicate one of a class of marine animals, including ascidians.
tunicated having the form of a tunicate.
zoantharian a member of the Zoantharia, the order including sea-anemones.
zoarial relating to a zoarium, the zooids of a polyzoan colony.
zoophytic relating to a zoophyte, a plantlike animal, as coral, sea anemone, etc.
zoophytical relating to a zoophyte, a plantlike animal, as coral, sea anemone, etc.
zooplankter a single zooplankton.
zooplankton tiny, free-floating organisms in aquatic systems.
zooxanthella a symbiotic dinoflagellate of the genus Symbiodinium that lives in the tissues of a number of marine invertebrates and protists.