A single quotation mark, ('). This is often used for a quote within a quote, as in Tom said 'What?'

A person who proselytes; a proselytizer.

Any of the many species of grasses of genus Muhlenbergia.

(organic chemistry) The bicyclic sesquiterpene (1S,4R,4aR)-1-isopropyl-4-methyl-7-methylene-1,2,3,4,4a,5,6,7-octahydronaphthalene