ESSENTIAL a. 8 definitions
. -- 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 winterg…
EXHALATION n. 3 definitions
he form of vapor, fume, or steam; effluvium; emanation; as, exhalations from the earth or flowers, decaying matter, etc. Ye mists and exhalations, that now rise From hill or steaming lake. Milton.