(UK) An industrial heating device, e.g. for smelting metal or baking ceramics. / (US, Canada) A device that provides heat for a building; a space heater. / (colloquial) Any area that is excessively...

(mineralogy) A monoclinic mineral containing aluminum, calcium, hydrogen, iron, oxygen, potassium, silicon, and sodium.

(surgery) A suture of the lip, typically to repair a congenital cleft lip

(biology) Following diauxic growth