Propolis - sap or resinous materials collected from trees or plants by bees and used to strengthen the comb and to seal cracks; also called bee glue. Pupa - the third stage in the development of the honey bee, during which it changes (pupates) from a larva to an adult bee. Propolis is a resin-like material from the buds of poplar and cone-bearing trees. Propolis is rarely available in its pure form. It is usually obtained from beehives and contains bee products. Propolis has a long history of medicinal use, dating back to 350 B.C., the time of Aristotle. Greeks have used propolis for abscesses; Assyrians have ... Propolis definition is - a brownish resinous material of waxy consistency collected by bees from the buds of trees and used as a cement in repairing and maintaining the hive. BioPure Brazilian Green Propolis comes from Brazilian Bees comes this extraordinarily useful aid to natural health.* BioPure’s Propolis is purified by extraction and is sold as a liquid tincture blend of gluten-free, 55% organic corn ethanol, and purified water; offered in a 1 fl oz liquid tincture with dropper.