1) Bitter purgative 2) Bitter, crystalline substance 3) Crystalline drug 4) Crystalline medicine 5) Crystalline substance 6) Extremely bitter drug 7) French boy name 8) Laxative from aloe 9) Lily plant extract 10) Medicinal plant extract 11) Medicine from aloes 12) Pharmaceutical item 
• (n.) A bitter purgative principle in aloes.
Al'o·in noun (Chemistry) A bitter purgative principle in aloes. 
Type: Term Pronunciation: al′ō-in Definitions: 1. A yellow crystalline principle composed of aloe-emodin and glucose, obtained from aloe; used as a laxative. Synonyms: aloetin, barbaloin
an intensely bitter, crystalline, water-soluble powder composed of the active principles of and obtained from aloe, used chiefly as a purgative.