rasp : Idioms & Phrases
rasp fern
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noun any fern of the genus Doodia having pinnate fronds with sharply dentate pinnae
doodia.
WordNet
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.
