(phonology) A phonemic merger where the vowels in pin and pen are pronounced the same before /n/ and /m/, making pin and pen homonyms.

A tray with round indentations for baking muffins.

(chemistry) Any of a class of organic compound formed by addition of an oxygen atom to an amine - R₃N⁺-O⁻, but sometimes written R₃N=O.

A hand-to-hand fight or brawl in which glass bottles are used as extempore weapons.