Nipple

A nipple was a body part located on the breast. (PROSE: Cat's Cradle: Warhead)

Ace punched Vincent Wheaton for touching her nipple. (PROSE: Cat's Cradle: Warhead)

A glass avatar of Nardole revealed that he had nipples made of glass. (TV: Twice Upon a Time)

According to Ianto Jones, geranium leaves are supposed to be good when lactating. Jack Harkness subsequently asked if Ianto was lactating "with an expression of dangerous interest". (PROSE: Almost Perfect)