D defs.my
Entry 2 senses Webster, 1913

Crasis

/(kr?"s?s)/ · Cra·sis · IPA /ˈkɹeɪsɪs/
01 n. A mixture of constituents, as of the blood; constitution; temperament.
  1. 1.
    A mixture of constituents, as of the blood; constitution; temperament.(Med.)
  2. 2.
    A contraction of two vowels (as the final and initial vowels of united words) into one long vowel, or into a diphthong; synæresis; as, cogo for coago.(Gram.)