sea urchin

sea ur·chin (seґ urґchin) any of various marine animals of the class Echinoidea, having round bodies enclosed in a shell with spiny processes and pedicellariae protruding from it. Genera such as Diadema and Echinothrix may secrete venom from glands on the pedicellariae.

Medical dictionary. 2011.

Look at other dictionaries:

  • sea urchin — sea urchins N COUNT A sea urchin is a small round sea creature that has a hard shell covered with sharp points …   English dictionary

  • Sea urchin — Sea ur chin (Zo[ o]l.) Any one of numerous species of echinoderms of the order {Echinoidea}. Note: When living they are covered with movable spines which are often long and sharp. [1913 Webster] …   The Collaborative International Dictionary of English

  • sea urchin — sea .urchin n a small round sea animal with a hard shell covered in sharp points …   Dictionary of contemporary English

  • sea urchin — sea ,urchin noun count a small round animal that lives in the ocean and has a hard shell with sharp points …   Usage of the words and phrases in modern English

  • sea urchin — ► NOUN ▪ a marine animal which has a shell covered in mobile spines …   English terms dictionary

  • sea urchin — n. [so named because of its spines] any of various orders of echinoid echinoderms having a somewhat globular body of fused skeletal plates studded with long, calcareous, movable spines …   English World dictionary

  • Sea urchin — Taxobox name = Sea urchin image width = 250px image caption = Sea urchins, Sterechinus neumayeri regnum = Animalia phylum = Echinodermata subphylum = Echinozoa classis = Echinoidea classis authority=Leske, 1778 subdivision ranks = Subclasses… …   Wikipedia

  • sea urchin —   Wana, wanawana, wana kauila; ina.    ♦ Various kinds: hā uke uke (also, name of a tapa design); hā uke uke iwi loloa, hā uke, hā uka uka, hā ue ue, hāku eku e, hāwa e, hālula, pūnohu, hulu anai, niho, hailimoa.    ♦ Sea urchin meat, alelo, poke …   English-Hawaiian dictionary

  • sea urchin — UK / US noun [countable] Word forms sea urchin : singular sea urchin plural sea urchins a small round animal that lives in the sea and has a hard shell with sharp points …   English dictionary

  • sea urchin — noun shallow water echinoderms having soft bodies enclosed in thin spiny globular shells • Hypernyms: ↑echinoderm • Hyponyms: ↑edible sea urchin, ↑Echinus esculentus, ↑sand dollar, ↑heart urchin • Member Holonyms: ↑ …   Useful english dictionary

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