copulation

Play has been reported in reptiles, fish, and even spiders, where sexually immature animals use it to practice copulation.
Why It Pays to Play Around - Issue 94: Evolving|Andreas Wagner|December 16, 2020|Nautilus
In duck ponds, Prum said, a lot of forced copulation occurs.
Yes, We Should Study Duck Penises|Michael Tomasky|March 25, 2013|DAILY BEAST
"The females are enormously, amazingly successful at preventing fertilization by forced copulation," he said.
Yes, We Should Study Duck Penises|Michael Tomasky|March 25, 2013|DAILY BEAST
This posture, to which they are easily accustomed, becomes natural to them, since they assume it at the time of their copulation.
Buffon's Natural History. Volume VIII (of 10)|Georges Louis Leclerc de Buffon

It has been asserted, that another kind of mule is produced from the copulation of the bull with the mare.
Buffon's Natural History. Volume IX (of 10)|Georges Louis Leclerc de Buffon
The architecture of their bodies would make face to face copulation very difficult.
The Natural Philosophy of Love|Remy de Gourmont
Il y aurait peut-tre une certain correlation entre la copulation complte et profonde et le dveloppement crbral.
The Natural Philosophy of Love|Remy de Gourmont
And as the glans of man are the seat of the greatest pleasure in copulation, so is this in the woman.
The Works of Aristotle the Famous Philosopher|Anonymous

Medical definitions for copulation

copulation

[ kŏp′yə-lā′shən ]

Conjugation between two cells that do not fuse but separate after mutual fertilization.

coitus

cop′u•late′ v.