I. noun 1. [ mass noun] — a gelatinous substance obtained from a kind of aloe, used especially in cosmetics as an emollient. 2. the plant that yields aloe vera, grown chiefly in the Caribbean area and the southern US.● Aloe vera, family Liliaceae (or Aloaceae).
– origin early 20th cent.: modern Latin, literally ‘true aloe’, probably in contrast to the American agave, which closely resembles aloe vera: both plants were formerly classified together in the lily family.