crasis /ˈkɹeɪsɪs/ noun3 •A mixture or combination. •The contraction of a vowel or diphthong at the end of a word with a vowel or diphthong at the start of the following word.When in a crasis, a lene consonant […] is combined with an aspirated vowel, the lene is always changed (except in the Ionic dialect) into the corresponding aspirate […] — 1861 •(no longer used) One's constitution; the balance of humours in a person's body. formscrases