资料来源 : Webster's Revised Unabridged Dictionary (1913)

Dorsal \Dor"sal\, a. [F. dorsal, LL. dorsalis, fr. L. dorsualis,
   fr. dorsum back; cf. Gr. ?, ?, mountain ridge. Cf. {Dorse},
   {Dorsel}, {Dosel}.]
   1. (Anat.) Pertaining to, or situated near, the back, or
      dorsum, of an animal or of one of its parts; notal;
      tergal; neural; as, the dorsal fin of a fish; the dorsal
      artery of the tongue; -- opposed to {ventral}.

   2. (Bot.)
      (a) Pertaining to the surface naturally inferior, as of a
          leaf.
      (b) Pertaining to the surface naturally superior, as of a
          creeping hepatic moss.

   {Dorsal vessel} (Zo["o]l.), a central pulsating blood vessel
      along the back of insects, acting as a heart.