the GNU version of the Collaborative International Dictionary of English
adj. Three-pointed; ending in three points.
The Century Dictionary and Cyclopedia
Three-pointed; ending in three points: as, a tricuspidate glume; tricuspidate teeth.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. having three cusps or points (especially a molar tooth)
Word Usage
"It differs from _G. nutans_ in being an annual and in having filiform leaves, bicuspidate third glume which is scabrid all over the back and a fourth glume distinctly tricuspidate at the apex."