• Webster's Revised Unabridged Dictionary
    • Crasis (Gram) 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.
    • Crasis (Med) A mixture of constituents, as of the blood; constitution; temperament.
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Century Dictionary and Cyclopedia
    • n crasis In medicine, the mixture of the constituents of a fluid, as the blood; hence, temperament; constitution.
    • n crasis In grammar, a figure by which two different vowels are contracted into one long vowel or into a diphthong, as alēthea into alēthē, teicheos into teichous. It is otherwise called syneresis. Specifically, in Greek grammar, the blending or contraction of the final vowel-sound (vowel or diphthong) of one word with the initial vowel-sound of the next, so as to form a long vowel or diphthong. The two words are then written as one, and the sign (') called a coronis, similar in appearance to a smooth breathing, or instead of the coronis the rough breathing of the article or relative pronoun if these stand first, is written over the contracted vowel-sound, as τἀγαθά for τα\ ἀγαθά, κἀν for και\ ἐν, ἁνήρ for ὁ ἀνήρ.
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Chambers's Twentieth Century Dictionary
    • n Crasis krā′sis the mixture of different elements in the constitution of the body: temperament:
    • n Crasis krā′sis (gram.) the mingling or contraction of two vowels into one long vowel, or into a diphthong.
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Webster's Revised Unabridged Dictionary
LL., temperament, fr. Gr. , fr. to mix
Chambers's Twentieth Century Dictionary
Gr. krasiskerannynai, to mix.


In literature:

All the fellows are sure to be crasy about you.
"Bab: A Sub-Deb" by Mary Roberts Rinehart
Other examples of lengthening are 'bathos', 'pathos', while the long quantity is of course kept in 'colon' and 'crasis'.
"Society for Pure English Tract 4" by John Sargeaunt
Every one on this ship is crasie to get at the Spanish.
"The Voyage of the Oregon from San Francisco to Santiago in 1898" by R. Cross