Source : Webster's Revised Unabridged Dictionary (1913)

Colostrum \Co*los"trum\, n. [L., biestings.] (Med.)
      (a) The first milk secreted after delivery; biestings.
      (b) A mixture of turpentine and the yolk of an egg,
          formerly used as an emulsion.

Source : WordNet®

colostrum
     n : milky fluid secreted for the first day or two after
         parturition [syn: {foremilk}]