The Collaborative International Dictionary of English v.0.48:

Glans \Glans\n.; pl. Glandes. [L. See Gland.]
   [1913 Webster]
   1. (Anat.) The vascular body which forms the apex of the
      penis, and the extremity of the clitoris.
      [1913 Webster]

   2. (Bot.) The acorn or mast of the oak and similar fruits.
      --Gray.
      [1913 Webster]

   3. (Med.)
      (a) Goiter.
      (b) A pessary. [Obs.]
          [1913 Webster]

WordNet (r) 3.0 (2006):

glans
    n 1: a small rounded structure; especially that at the end of
         the penis or clitoris