ETHYLENE n.
ch liquid), -- hence called olefiant gas. Called also ethene, elayl, and formerly, bicarbureted hydrogen. Ethylene series (Chem.), the series if unsaturated hydrocarbons of which ethylene is the type, and represented by the general formula CnH2n.
EXCRESCENCE n.
t appendage, as, a wart or tumor; anything growing out unnaturally from anything else; a preternatural or morbid development; hence, a troublesome superfluity; an incumbrance; as, an excrescence on the body, or on a plant. "Excrescences of joy." Jer. Taylor. The excrescences of the Spanish monarchy. Addison.…