What does "coitus" mean?

Sexual intercourse, especially involving penile–vaginal penetration.

What is a synonym for "coitus"?

Common synonyms include: copulation, sexual intercourse, act of love, adultery, aphrodisia, ass.

/ˈkɔɪ.təs/ noun

noun ·Uncommon ·College level

Noun

1
Sexual intercourse, especially involving penile–vaginal penetration. also, countable, formal, humorous, uncountable
"Wolowitz: Hang on. There really is a lady here? Leonard: Uh-huh. Wolowitz: And you want us out because you’re anticipating coitus? Leonard: No, she’s just a friend. Wolowitz: So she’s available for coitus? Leonard: No, she’s – –"
2
sexual activity between individuals, especially the insertion of a man's penis into a woman's vagina until orgasm and ejaculation occur wordnet

"Coitus interruptus does not protect against STDs."

From Latin coitus.