Manna

[Deja Q]

Everybody in religion uses this word.

So I looked up the definition of it.

A))
(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.
1913 Webster

or

B))
(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.
1913 Webster


(off-topic) Now, can you imagine a bunch of folks travelling across the desert, eating manna, and having to live with the resultant effects of a (even gentle) laxative?!?!