Azadirachta: A plant genus of the family MELIACEAE. Members contain azadirachtin A (a limonoid commonly referred to as azadirachtin) and other TRITERPENES. They have been used in PESTICIDES. The old name of Melia azadirachta is very similar to a related plant, MELIA AZEDARACH.Limonins: A group of degraded TRITERPENES in which the four terminal carbons of the C17 side chain have been removed, and the remaining portion often forming C17 furans.Plant Extracts: Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard.Melia azedarach: A plant species of the genus MELIA, family MELIACEAE, which is toxic to insects. The name is very similar to Melia azadirachta (AZADIRACHTA).Meliaceae: The mahogany plant family of the order Sapindales, subclass Rosidae, class Magnoliopsida.OcimumPhytotherapy: Use of plants or herbs to treat diseases or to alleviate pain.Terpenes: A class of compounds composed of repeating 5-carbon units of HEMITERPENES.