eleo-, elaeo-, elaio-

(Greek: oil, olive oil)

A tumor or swelling caused by the injection of oil into the tissues.
An instrument for determining the percentage of oil in a mixture; also, the specific gravity of oils.
eleopathy (s) (noun), eleopathies (pl)
An uncommon condition of the swelling of the joints: Eleopathy is possibly due to a fatty deposit following a contusion which is an injury of a person's body, but without a break in the skin.
The treatment of diseases by the administration of oils given internally or applied externally; oleotherapy.