ESSENTIAL a.
-- Essential oils (Chem.), a class of volatile oils, extracted from plants, fruits, or flowers, having each its characteristic odor, and hot burning taste. They are used in essences, perfumery, etc., and include many varieties of compounds; as lemon oil is a terpene, oil of bitter almonds an aldehyde, oil of wintergr…
EXHAUST a.
ugh a place, as through a furnace, instead of blowing it through. -- Exhaust fan, a fan blower so arranged as to produce an exhaust draught, or to draw air or gas out of a place, as out of a room in ventilating it. -- Exhaust nozzle, Exhaust orifice (Steam Engine), the blast orifice or nozzle. -- Exhaust pipe (Steam…