nut grass

American  

noun

1. either of two sedges, Cyperus rotundus or C. esculentus, that have small, nutlike tubers and are often troublesome weeds.

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Etymology

Origin of nut grass

An Americanism dating back to 1765–75

Example Sentences

There is a grass called nut grass, and another called Parramatta grass, either of which holds its own against anything living or dead.

From Three Elephant Power and Other Stories by Paterson, A. B. (Andrew Barton)