(typography) A quad which has a fixed width of 1 em.

A system in which the delivery of a service or the quality of a product is assessed, and compared with that required.

(physics) quantum mechanics

plural of quantum state

plural of quail-pipe

plural of quail pipe

(linguistics) A vowel’s duration of articulation; its length.

plural of quantum theory

(music) A meter or rhythm with four beats to a measure and four beats to a whole note. Specifically common time.

(physics) joined together by quantum entanglement