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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Tre·ha·la n. Chem. An amorphous variety of manna obtained from the nests and cocoons of a Syrian coleopterous insect (Larinus maculatus, Larinus nidificans, etc.) which feeds on the foliage of a variety of thistle. It is used as an article of food, and is called also nest sugar.