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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
  • Amazon. com: Caltrops Tire Spikes
    Browse a wide selection of tire studs designed for winter driving Explore carbide screw spikes with installation tools for improved grip
  • How to Make Caltrops | DIY Caltrops - Survival Life
    Caltrops are ancient military devices used for defensive purposes, primarily to impede or deter enemy movement They are small, metal, or wooden objects designed with four sharp spikes or points, arranged so that, no matter how they are thrown or scattered, one tip always points upwards
  • 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
  • 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)
  • Caltrop - Forgotten Realms Wiki
    Caltrops were effective items used by some rogues and adventurers to dissuade pursuit [1]
  • What Are Water Caltrops And How Do You Cook With Them?
    Water caltrops are the seeds, nuts, pods, or fruit — you'll see all four terms used — of plants in the Trapa genus You'll also hear the name used to refer to the entire plant Most water caltrops that you see online are Trapa natans, and they have four spikes
  • 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: The Deadly Spikes That Changed Warfare Forever
    The caltrop represents more than just a weapon – it’s a testament to human ingenuity in conflict A small, seemingly insignificant object that could change the course of battles, protect territories, and strike fear into enemies





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