Definition of crasis in English:

crasis

noun

Phonetics
  • A contraction of two adjacent vowels into one long vowel or diphthong, for example the reduction of words in ancient Greek from three syllables to two.

    • ‘In some cases analogous to crasis two simple tags best describe a single Greek word.’
    abbreviation, short form, shortened form, elision
    View synonyms

Origin

Mid 16th century (as a medical term denoting the blending of physical qualities giving rise to a particular state of health): from Greek krasis mixture.

Pronunciation:

crasis

/ˈkreɪsɪs/