a caltrop, Tribulus terrestris, having spiny fruit that can puncture tires.
Also called puncture vine.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a tropical or subtropical prostrate vine, Tribulus terrestris, with yellow flowers and a hard, spiny fruit which breaks into five sections at maturity
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012