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.
A swelling of the joints, possibly due to a fatty deposit following a contusion (an injury of a part without a break in the skin; a bruise).
The treatment of diseases by the administration of oils given internally or applied externally; oleotherapy.