Definition
Oleaceous describes plants belonging to the olive family (Oleaceae). These plants are characterized by opposite leaves, flowers with four petals, and fruits that are often drupes or capsules. Think of it as describing plants that are related to olives, lilacs, and jasmines. Oleaceous plants are found in various habitats around the world. Many of them are cultivated for their ornamental value or for their edible fruits and oils. It is a botanical term used in plant classification and identification.