caltrop

noun

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cal·trop | \ ˈkal-trəp

, ˈkȯl- \

variants: or less commonly calthrop \ ˈkal-thrəp

, ˈkȯl- \

Definition of caltrop

1a caltrops also calthrops plural in form but singular or plural in construction : star thistle sense 1

b : puncture vine also : any of various related herbs (genera Tribulus and Kallstroemia) of the same family (Zygophyllaceae, the caltrop family)

2 : a device with four metal points so arranged that when any three are on the ground the fourth projects upward as a hazard to the hooves of horses or to pneumatic tires

Examples of caltrop in a Sentence

Recent Examples on the Web The book’s cover image reflects the internal shape of the novel: a caltrop. — Caroline Hallemann, Town & Country, "Outlander Season 7: Everything We Know So Far," 14 Mar. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'caltrop.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.