Rasp palm

(Bot.) a Brazilian palm tree (Iriartea exorhiza) which has strong aërial roots like a screw pine. The roots have a hard, rough surface, and are used by the natives for graters and rasps, whence the common name.

See also: Rasp

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.