Search:hydractinian -> HYDRACTINIAN
hydractinian
h y d r a c t i n i a n hex:#104;#121;#100;#114;#97;#99;#116;#105;#110;#105;#97;#110;
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- Hydractinian - n. - 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.