Cra"sis (kr?"s?s), n. [LL., temperament, fr. Gr. , fr. to mix.]
A mixture of constituents, as of the blood; constitution; temperament.
A contraction of two vowels (as the final and initial vowels of united words) into one long vowel, or into a dipthong; synaeresis; as, cogo for coago.
© Webster 1913.