n. [Gr. gaster, stomach; zoon, animal]
(CNIDARIA: Hydrozoa)
In some colonial cnidarians, a hydroid modified for feeding and digestion, also called siphons; in most species, they fulfill the defensive functions of the colony; see dactylozooid.

Online Dictionary of Invertebrate Zoology. . 2005.

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  • gastrozooid — gas·tro·zooid …   English syllables

  • gastrozooid — |gastrə+ noun Etymology: International Scientific Vocabulary gastr + zooid : a zooid provided with a mouth and digestive organs : trophozooid …   Useful english dictionary

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  • conarium — n.; pl. aria [L. conus, cone] (CNIDARIA: Hydrozoa) The earliest larva known that becomes a primary gastrozooid, and later develops an enlarged pneumatophore …   Dictionary of invertebrate zoology

  • cormidium — n.; pl. cormidia [Gr. dim. kormos, trunk of a tree] (CNIDARIA: Hydrozoa) A siphonophore gastrozooid with a tentacle and one or more gonophores of one sex; sensu stricto, cormidia are colonies within colonies; see eudoxome …   Dictionary of invertebrate zoology

  • dactylozooid — n. [Gr. daktylos, finger; zoon, animal] (CNIDARIA: Hydrozoa) In colonial hydrozoans, a hydroid modified for protection and the capture of prey; protective polyp, zooid or machozooid; a hydrocyst; a palpon; see tentaculozooid, gastrozooid …   Dictionary of invertebrate zoology

  • siphons — see gastrozooid …   Dictionary of invertebrate zoology

  • tentaculozooid — n. [L. tentaculum, feeler; Gr. zoon, animal; eidos, form] (CNIDARIA: Hydrozoa) A modified polyp in the form of a single tentacle, usually found at the outermost part of the colony; a protective zooid; see tentaculozooid, gastrozooid …   Dictionary of invertebrate zoology

  • trophozooid — see gastrozooid …   Dictionary of invertebrate zoology

  • Portuguese man-of-war — any of several large, oceanic hydrozoans of the genus Physalia, having a large, bladderlike structure with a saillike crest by which they are buoyed up and from which dangle tentacles with stinging cells. [1700 10] * * * Any of various floating,… …   Universalium

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