(chemistry) Liquefaction through absorption of moisture from the air. / (pathology) An abrupt loss of consciousness usually caused by an insufficient blood flow to the brain; fainting.

A plant, Atropa belladonna, having purple bell-shaped flowers and poisonous black glossy berries. / An alkaloid extracted from this plant, sometimes used medicinally, containing atropine.

Alternative spelling of greyfriar

A surname.