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Definitions of alca
  1. noun
    type genus of the Alcidae comprising solely the razorbill

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Definition that contains alca
  • shell the hard largely calcareous covering of a mollusc or a brachiopod
  • coral marine colonial polyp characterized by a calcareous skeleton; masses in a variety of shapes often forming reefs
  • cuttlefish ten-armed oval-bodied cephalopod with narrow fins as long as the body and a large calcareous internal shell
  • dentine a calcareous material harder and denser than bone that comprises the bulk of a tooth
  • dentin a calcareous material harder and denser than bone that comprises the bulk of a tooth
  • cuttle ten-armed oval-bodied cephalopod with narrow fins as long as the body and a large calcareous internal shell
  • foram marine microorganism having a calcareous shell with openings where pseudopods protrude
  • gorgonian corals having a horny or calcareous branching skeleton
  • parasite yew rare and endangered monoecious parasitic conifer of New Caledonia; parasitic on Falcatifolium taxoides
  • sanfoin Eurasian perennial herb having pale pink flowers and curved pods; naturalized in Britain and North America grasslands on calcareous soils; important forage crop and source of honey in Britain
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