A person or organisation that is subject to regulation

(Australian rules football) The third quarter of a match.

The condition of being bifacial

(organic chemistry) The naphthoquinone (2S,10S)-3,12-dioxapentacyclo[11.8.0.02,10.04,9.015,20]henicosa-1(13),4,6,8,15,17,19-heptaene-14,21-dione that has antileishmanial activity