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Thesaurus: hydractinian

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. Se…

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hydroidsdefinitiongenusdefinitionshellsdefinitionmarinedefinitionathecatadefinitionchitinousdefinitioncoatingdefinitioncrabsdefinitionESPdefinitionfirmdefinitionformdefinitiongeneradefinitionhermitdefinitionseedefinitionspeciesdefinitionspiraldefinitionstonesdefinitiontheirdefinitionallieddefinitionoccupieddefinitionbiologydefinitionhydroiddefinitionpluraldefinitionhydrafamilyhydra-taintedfamilyhydrachnidfamilyhydracidfamilyhydracrylicfamily

Definitions

  1. 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.
  2. 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.
  3. Any species or marine hydroids, of the genus Hydractinia andallied genera. These hydroids form, by their rootstalks, a firm,chitinous coating on shells and stones, and esp. on spiral shellsoccupied by hermit crabs. See Illust. of Athecata.
  4. hydractinian (plural hydractinians) (biology) A marine hydroid of the genus Hydractinia or a closely-related genus