I. ˈhīˌdrȯid adjective
also hy·droidean (ˈ)hī|drȯidēən
Etymology: hydroid from New Latin Hydroida; hydroidean from New Latin Hydroidea + English -an (adjective suffix)
: of or relating to the Hydroida or Hydrozoa : resembling a polyp of the genus Hydra
II. noun
also hydroidean “
( -s )
Etymology: hydroid from New Latin Hydroida; hydroidean from New Latin Hydroidea + English -an (n. suffix)
1. : one of the Hydroida : hydrozoan
2. : the polyp form of a hydrozoan as distinguished from the medusa form — see hydromedusa