lu·nule /ˈlu(ˌ)nju(ə)l/
  半月形的東西
  lu·nule /ˈlu(ˌ)nju(ə)l/ 名詞
  前月面
  Lu·nule n.
  1. Anat. Anything crescent-shaped; a crescent-shaped part or mark; a lunula; a lune.
  2. Chem. A lune. See Lune.
  3. Zool. (a) A small or narrow crescent. (b) A special area in front of the beak of many bivalve shells. It sometimes has the shape of a double crescent, but is oftener heart-shaped. See Illust. of Bivalve.
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  lunule
       n : the crescent-shaped area at the base of the human fingernail
           [syn: half-moon, lunula]