hydroid

hy·droid

H0346300 (hī′droid′)n.1. Any of numerous solitary or colonial hydrozoans having a polyp rather than a medusa as the dominant stage of the life cycle.2. The asexual polyp in the life cycle of a hydrozoan.

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[hydr(a) + -oid.]

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hy′droid′ adj.

hydroid

(ˈhaɪdrɔɪd) adj1. (Animals) of or relating to the Hydroida, an order of colonial hydrozoan coelenterates that have the polyp phase dominant2. (Zoology) (of coelenterate colonies or individuals) having or consisting of hydra-like polypsn (Zoology) a hydroid colony or individual[C19: from hydra + -oid]

hy•droid

(ˈhaɪ drɔɪd)

adj. 1. of or pertaining to the hydrozoan order Hydroidea, including hydras and marine colonial forms. n. 2. the phase of hydrozoan development that consists of polyp forms. [1860–65; hydr(a) + -oid; compare New Latin Hydroidea]

Thesaurus

Noun

1.

hydroid - colonial coelenterates having the polyp phase dominanthydrozoancnidarian, coelenterate - radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp and medusa formsplanula - the flat ciliated free-swimming larva of hydrozoan coelenteratesclass Hydrozoa, Hydrozoa - coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfisheshydra - small tubular solitary freshwater hydrozoan polypsiphonophore - a floating or swimming oceanic colony of polyps often transparent or showily coloredsertularian - feathery colony of long-branched stems bearing stalkless paired polyps