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 winterg…
FENNEL n.
nnel (Anthemis Cotula), a foul-smelling European weed; -- called also mayweed. -- Fennel flower (Bot.), an herb (Nigella) of the Buttercup family, having leaves finely divided, like those of the fennel. N.Damascena is common in gardens. N.sativa furnishes the fennel seed, used as a condiment, etc., in India. These see…