Definitions for caltropˈkæl trəp; -θrəp
Random House Webster's College Dictionary
cal•tropˈkæl trəp; -θrəp(n.)
or cal•trap ; also cal•throp
any of several plants having spiny heads or fruit, as those of the genera Tribulus and
an iron ball with four projecting spikes, one of which always points upward when the ball is placed on the ground: used to obstruct cavalry, vehicles, etc.
Origin of caltrop:
bef. 1000; ME calketrappe, OE calcatrippe
caltrop, devil's weed, Tribulus terestris(noun)
tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed
water chestnut, water chestnut plant, caltrop(noun)
a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
star-thistle, caltrop, Centauria calcitrapa(noun)
Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America
A small, metal object with spikes arranged so that, when thrown onto the ground, one always faces up as a threat to passers-by.
The starthistle, Centaurea calcitrapa, a plant with sharp thorns.
A flowering plant, Tribulus terrestris, in the family Zygophyllaceae, native to warm temperate and tropical regions of the Old World.
Origin: From the Latin calcitrapa "thistle"
alt. of Caltrap