or di·aer·e·sis

[ dahy-er-uh-sis ]
/ daɪˈɛr ə sɪs /

noun, plural di·er·e·ses [dahy-er-uh-seez] /daɪˈɛr əˌsiz/.

the separation of two adjacent vowels, dividing one syllable into two.
a sign (¨) placed over the second of two adjacent vowels to indicate separate pronunciation, as in one spelling of the older forms naïve and coöperate: no longer widely used in English.
Prosody. the division made in a line or verse by coincidence of the end of a foot and the end of a word.

Origin of dieresis

1605–15; < Latin diaeresis < Greek diaíresis literally, distinction, division, equivalent to diaire-, stem of diaireîn to divide (di- di-3 + haireîn to take) + -sis -sis

Related forms

di·e·ret·ic [dahy-uh-ret-ik] /ˌdaɪ əˈrɛt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for dieretic


/ (daɪˈɛrɪsɪs) /

noun plural -ses (-ˌsiːz)

a variant spelling of diaeresis

Derived Forms

dieretic (ˌdaɪəˈrɛtɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for dieretic (1 of 2)


[ dī′ə-rĕtĭk ]


Of or relating to dieresis.
Dividing; ulcerating; corroding.

Medicine definitions for dieretic (2 of 2)


[ dī-ĕrĭ-sĭs ]


solution of continuity
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.