Definify.com

Webster 1913 Edition

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Noun.

[L., fr. Gr. [GREEK], fr. [GREEK] to sit together;

σύν

with + [GREEK] to sit.]

(Med.)

An obliteration of the pupil of the eye.

(Gram.)

A contraction of two syllables into one; synecphonesis.

synizesis ‎(plural synizeses)

(poetry) A poetic figure of speech in which two consecutive vowel sounds in the same word are pronounced as a single phoneme so that certain words adhere to a particular poetic meter.
(linguistics) The pronunciation of two separate vowels as a single one.
(medicine) An obliteration of the pupil of the eye.
(biology) A phenomenon sometimes observed during meiosis.

poetic figure of speech

linguistic feature

eye defect

biological phenomenon