simple past tense and past participle of underfilter

(anatomy) A natural outgrowth, swelling or enlargement, usually of an organism; a protuberance on a bone. / (botany) The external part of a cone scale. / (geology) A branch of a dike or vein.

A machine with three pulleys which act together to raise great weights.

(archaic or historical) Synonym of pharmacist: a person who sells medicine, an apothecary.