- (used with a singular or plural verb) a composite plant, Bidens bipinnata, having achenes with downwardly barbed awns.
- (used with a plural verb) the achenes themselves.
Origin of Spanish needles
An Americanism dating back to 1735–45; in allusion to its tropical American origin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018