D defs.my
Entry 2 senses Webster, 1913

Exostosis

· Ex·os·to·sis · IPA
01 n. Any protuberance of a bone which is not natural; an excrescence or morbid enlargement of a bone.
  1. 1.
    Any protuberance of a bone which is not natural; an excrescence or morbid enlargement of a bone.(Med.)
  2. 2.
    A knot formed upon or in the wood of trees by disease.(Bot.)