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caltrop    
n. 拦路钩

拦路钩

caltrop
n 1: tropical annual procumbent poisonous subshrub having fruit
that splits into five spiny nutlets; serious pasture weed
[synonym: {caltrop}, {devil's weed}, {Tribulus terestris}]
2: a plant of the genus Trapa bearing spiny four-pronged edible
nutlike fruits [synonym: {water chestnut}, {water chestnut
plant}, {caltrop}]
3: Mediterranean annual or biennial herb having pinkish to
purple flowers surrounded by spine-tipped scales; naturalized
in America [synonym: {star-thistle}, {caltrop}, {Centauria
calcitrapa}]

Caltrop \Cal"trop\, Caltrap \Cal"trap\, n. [OE. calketrappe,
calletrappe, caltor (in both senses), fr. AS. collr[ae]ppe,
calcetreppe, sort of thistle; cf. F. chaussetrape star
thistle, trap, It. calcatreppo, calcatreppolo, star thistle.
Perh. from L. calx heel the same word as E. trap. See 1st
{Trap}.]
1. (Bot.) A genus of herbaceous plants ({Tribulus}) of the
order {Zygophylle[ae]}, having a hard several-celled
fruit, armed with stout spines, and resembling the
military instrument of the same name. The species grow in
warm countries, and are often very annoying to cattle.
[1913 Webster]

2. (Mil.) An instrument with four iron points, so disposed
that, any three of them being on the ground, the other
projects upward. They are scattered on the ground where an
enemy's cavalry are to pass, to impede their progress by
endangering the horses' feet.
[1913 Webster]


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  • Caltrop - Wikipedia
    A caltrop is a device composed of four spikes or points arranged so that in whatever manner it is thrown on the ground, it rests on three and presents the fourth upright
  • The Caltrop: A Weapon Thats Barely Changed Over 2,300 Years
    Although it was used for centuries by numerous armies, the unobtrusive-looking device called the caltrop, or calthrop, has often been overlooked by military historians, but certainly not by anyone unfortunate enough to have encountered it under field conditions
  • Caltrop (Tire Spike) - CIA
    Caltrops were typically placed on roadways to slow attacking troops traveling by vehicle or animal The caltrop was “the simplest weapon we ever made,” according to Dr Stanley Lovell, the Director of the Research Development Branch of the Office of Strategic Services (OSS)
  • Medieval Weapons: Caltrops. Types of Caltrops, Facts and History
    Caltrops were medieval area-denial weapons made up of sharp spines arranged so that one of them always points upward They slowed the advance of troops
  • The Enduring Legacy of the Caltrop: From Ancient Battlefields to Modern . . .
    The caltrop is a deceptively simple but highly effective weapon that has remained relevant for over 2,500 years First recorded in 5th century BC Greece and Persia, caltrops were designed to stop cavalry charges by injuring the hooves of horses
  • Caltrop: An Ancient Weapon in Modern Warfare
    The weapon, known as a caltrop, is a spiked device that can be strewn in large numbers, sometimes connected by a chain, across a roadway or other terrain to impede an enemy’s movement in an operational area
  • Silent Defender: How Caltrops Shaped Ancient Warfare
    Known variously as road caltrops or caltrop obstacles, these larger devices were used to defend against the rapid advances of motorised enemy forces, particularly during retreats or defensive operations
  • Caltrops: Medieval Spiked Weapons To Halt Armies
    Various medieval defensive weapons were used in battles during medieval times, and the caltrop was a popular one among these weapons This was a four-edged iron weapon with one edge pointing upwards and hurting the hoofs of the advancing horses
  • CALTROP Definition Meaning - Merriam-Webster
    When the police were eventually able to get past the garbage trucks, their tires were destroyed by caltrops (clusters of nails), which were thrown out of the escaping Audis along nearby streets
  • Caltrops - Historic Jamestowne
    Used in Europe as early as Ancient Roman times, they were thrown into the field of warfare to slow down advancing horse-drawn chariots, calvaries, and foot soldiers No matter how they are thrown, a caltrop always lands to rest on three of its spikes, with a dangerous fourth spike in the air





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