Manna

n.
  1. (Script.) The food supplied to the Israelites in their journey through the wilderness of Arabia; hence, divinely supplied food.
  2. (Bot.) A name given to lichens of the genus Lecanora, sometimes blown into heaps in the deserts of Arabia and Africa, and gathered and used as food; called also manna lichen.
  3. (Bot. & Med.) A sweetish exudation in the form of pale yellow friable flakes, coming from several trees and shrubs and used in medicine as a gentle laxative, as the secretion of Fraxinus Ornus, and Fraxinus rotundifolia, the manna ashes of Southern Europe.
    4. Manna insect (Zoöl),
    a scale insect (Gossyparia mannipara), which causes the exudation of manna from the Tamarix tree in Arabia.