caltrop


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cal·trop

 (kăl′trəp, kôl′-)
n.
2. Any of various plants bearing small spiny fruits, especially of the genera Tribulus and Kallstroemia.
3. A metal device with four projecting spikes so arranged that when three of the spikes are on the ground, the fourth points upward, used as a hazard to pneumatic tires or to the hooves of horses.

[Middle English calketrappe, from Norman French and from Old English calcatrippe, thistle, both from Medieval Latin calcatrippa, thistle : possibly from Latin calcāre, to tread on; see calque + trappa, trap (of Germanic origin).]

caltrop

(ˈkæltrəp) or

caltrap

;

calthrop

(ˈkælθrəp)
n
1. (Plants) any tropical or subtropical plant of the zygophyllaceous genera Tribulus and Kallstroemia that have spiny burs or bracts
2. (Plants) water caltrop another name for water chestnut1
3. (Plants) another name for the star thistle
4. (Military) military a four-spiked iron ball or four joined spikes laid upon the ground as a device to lame cavalry horses, puncture tyres, etc
[Old English calcatrippe (the plant), from Medieval Latin calcatrippa, probably from Latin calx heel + trippa trap1]

cal•trop

or cal•trap

(ˈkæl trəp)

also cal•throp

(-θrəp)

n.
1. any of several plants having spiny heads or fruit, as those of the genera Tribulus and Kallstroemeria.
2. 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.
[before 1000; Middle English calketrappe, Old English calcatrippe]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.caltrop - tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutletscaltrop - tropical annual procumbent poisonous subshrub having fruit that splits into five spiny nutlets; serious pasture weed
genus Tribulus, Tribulus - annual or perennial herbs or subshrubs of warm regions
subshrub, suffrutex - low-growing woody shrub or perennial with woody base
2.caltrop - a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruitscaltrop - a plant of the genus Trapa bearing spiny four-pronged edible nutlike fruits
genus Trapa, Trapa - small genus of Eurasian aquatic perennial herbs: water chestnut
Jesuits' nut, Trapa natans, water caltrop - a variety of water chestnut
ling, ling ko, Trapa bicornis - water chestnut whose spiny fruit has two rather than 4 prongs
aquatic plant, hydrophyte, hydrophytic plant, water plant - a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth
3.caltrop - Mediterranean annual or biennial herb having pinkish to purple flowers surrounded by spine-tipped scales; naturalized in America
centaury - any plant of the genus Centaurea
References in classic literature ?
Arms: Azure, three caltrops in chief over a fess sable.
Many are obviously related to guns, such as AR500-Targets, (4) which makes a metal target that is the shape of a tetrahedron, like a medieval caltrop.
The distinctive horned fruits of Trapa, commonly known as water chesnut or water caltrop, are among the most intensively studied and most easily recognized fossils in the Lythraceae (Fig.
The San Diego Association of Governments is project manager, with TY Lin as design engineer, Flatiron as general contractor and Caltrop responsible for construction management.
Try special delicacies such as moon cakes and water caltrop during the day.
The analytical method used in the current research is rooted in the tradition of discourse analysis through an interpretive perspective and situated in a theoretical framework called Caltrop Matrix of Identity or CMI (Dong, 2008).
gt;50 species of freshwater crab and crayfish; freshwater habitats with stagnant or slow-moving water (ponds, aquaculture) Intestinal Fasciolopsis buski Water caltrop, water chestnut, flukes water hyacinth, water bamboo, duckweed, water mimosa, water spinach; drainage systems of pig farms, freshwater habitats with stagnant or slow-moving waters Echinostoma spp.
Joan, though taunted by the English and wounded in the foot by a caltrop (a spiked ball left to cripple horses), led her men into battle, calling "go forward boldly in the name of God