noun. A bitter, yellow alkaloid, C₂₀H₁₉NO₅, obtained from several plants such as goldenseal and having medical uses as an antipyretic and antibacterial agent.

noun. An alkaloid (C₂₀H₁₇ NO₄) widely distributed in the vegetable kingdom, being found in the barberry and a considerable number of plants, or parts of plants, whose extracts combine a yellow color and bitter taste.

noun. An alkaloid obtained, as a bitter, yellow substance, from the root of the barberry, gold thread, and other plants.

noun. An alkaloid obtained, as a bitter, yellow substance, from the root of the barberry, gold thread, and other plants.

"Barberry contains berberine, which is believed to enhance immune function by stimulating immune cells called macrophages, white cells that circulate throughout the blood, gobbling bacteria, viruses, and other foreign invaders."

hydroquinone  impermanency  mescaline  saponin  scopolamine