COPULATION
Etymology
Noun
copulation (countable and uncountable, plural copulations)
(countable) The act of coupling or joining; union; conjunction.
(uncountable) Sexual procreation between a man and a woman or transfer of the sperm from male to female; usually applied to the mating process in nonhuman animals; coitus; coition.
Synonyms
• See also copulation
Source: Wiktionary
Cop`u*la"tion, n. Etym: [L. copulatio: cf. F. copulation.]
1. The act of coupling or joining; union; conjunction.
Wit, you know, is the unexpected copulation of ideas. Johnson.
2. The coming together of male and female in the act of generation;
sexual union; coition.
Source: Webster’s Unabridged Dictionary 1913 Edition