HYDRACTINIAN
\hˌa͡ɪdɹɐktˈɪni͡ən], \hˌaɪdɹɐktˈɪniən], \h_ˌaɪ_d_ɹ_ɐ_k_t_ˈɪ_n_iə_n]\
Definitions of HYDRACTINIAN
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Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinous coating on shells and stones, and esp. on spiral shells occupied by hermit crabs. See Illust. of Athecata.
By Oddity Software
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Any species or marine hydroids, of the genus Hydractinia and allied genera. These hydroids form, by their rootstalks, a firm, chitinous coating on shells and stones, and esp. on spiral shells occupied by hermit crabs. See Illust. of Athecata.
By Noah Webster.
