subcostal
  亞前緣
  sub·cos·tal /-ˈkɑstəl/ 形容詞
  肋骨下的
  Sub·cos·tal, n.
  1. Anat. A subcostal muscle.
  2. Zool. One of the principal nervures of the wings of an insect. It is situated next beneath or behind the costal. See Nervure.
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  Sub·cos·tal a. Anat. & Zool. Situated below the costas, or ribs; as, the subcostal muscles.
  Note: ☞ The subcostal muscles are distinct from, and within, the intercostal.