1. Any of various resins or oleoresins
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Type of: natural resin

• genus Attalea
• genus Atticus
• genus Aucuba
• genus Aulacorhyncus
• genus Aulostomus
• genus Aureolaria
• genus Auricularia
• genus Auriparus
• genus Australopithecus
• genus Austrocedrus
• genus Austrotaxus
• genus Automeris
• genus Avahi
• genus Avena
• genus Averrhoa
• genus Avicennia
• genus Ayapana
• genus Aythya
• genus Azadirachta
• genus Azolla
• genus Babesia
• genus Babyrousa
• genus Baccharis
• genus Bacillus
• genus Bacteroides