caltrop

== English == === Etymology === From Middle English calketrappe, from Old English calcatrippe, from Medieval Latin calcatrippa (“thistle”), from Latin calx or calcare (“to tread”) + trappa (“trap”). === Pronunciation === (General American) enPR: kăl'trəp, IPA(key): /ˈkæltɹəp/ Rhymes: -æltɹəp (UK) enPR: kăl'trəp, kôl'trəp, IPA(key): /ˈkaltɹəp/, /ˈkɔːltɹəp/ Rhymes: -æltɹəp, -ɔːltɹəp === Noun === caltrop (plural caltrops) (weaponry) A metal object, usually small, with spikes arranged so that, when thrown onto the ground, one always faces up as a threat to pedestrians, horses, and vehicles (also used as a heraldic charge). Alternative forms: caltrap, calthrop; galtrop, galthrap, galtrap, galthrop Synonyms: crow's foot, crowfoot, jackrock, cheval trap Hypernyms: weaponry, weapon Coordinate terms: Czech hedgehog (conceptually similar; large); punji, punji stick; spike strip (colloquial) The starthistle, Centaurea calcitrapa, a plant with sharp thorns. Synonym: knapweed Any of a number of flowering plants in the family Zygophyllaceae, including several members of the genus Kallstroemia and the species Tribulus terrestris, native to warm temperate and tropical regions. Hyponyms: (Tribulus terrestris) puncturevine, cat's head, yellow vine, goathead, burra, gokharu, bindii ==== Derived terms ==== water caltrop ==== Translations ==== === See also === caltrop on Wikipedia.Wikipedia Centaurea calcitrapa on Wikipedia.Wikipedia Kallstroemia on Wikipedia.Wikipedia Tribulus terrestris on Wikipedia.Wikipedia