(idiomatic, slang, derogatory) A person who prefers to date people significantly younger than themselves.

(inorganic chemistry, organic chemistry) The simple silane SiH₃SH; any organic derivative of this compound

a foot-support for a crucified person, projecting from the base of the cross / the platform in front of the altar on which celebrating priest stands

(medicine, obsolete) An old medicinal mixture of pitch and tar scraped from the sides of ships.