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[koh-i-tuh s] /ˈkoʊ ɪ təs/
sexual intercourse, especially between a man and a woman.
Origin of coitus
1705-15; < Latin: a coming together, uniting, sexual intercourse, equivalent to coi- (see coition) + -tus suffix of v. action
Related forms
coital, adjective
coitally, adverb
postcoital, adjective
postcoitally, adverb
precoital, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for coital


technical terms for sexual intercourse
Derived Forms
coital, adjective
Word Origin
C18 coitus: from Latin: a uniting, from coīre to meet, from īre to go
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
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Word Origin and History for coital



"copulation," 1713, scientific Latin, from Latin coitus "a meeting together; sexual union," past participle of coire, from com- "together" (see co-) + ire "come, go," (see ion). In Middle English as coite (early 15c.). Used in English in general senses of "meeting, uniting," and also of magnetic force, planetary conjunction, etc., before sexual sense came to predominate.

Online Etymology Dictionary, © 2010 Douglas Harper
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coital in Medicine

coitus co·i·tus (kō'ĭ-təs, kō-ē'-)
Sexual union between a male and a female involving insertion of the penis into the vagina. Also called coition, copulation.

co'i·tal adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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