LAT

Lewis Short

trĭbŭlus | trĭbŏl- (noun M) : (), , , = τρίβολος
* An instrument resting on three of its iron prongs, while a fourth projected upward, thrown on the ground to impede an enemy's cavalry, a caltrop.
* Lit.: tribulos abjecerunt,Veg. Mil. 3, 24.
* Transf., from its resemblance in form.
* A kind of thorn or thistle, land-caltrops: Tribulus terrestris, Linn.; Verg. G. 1, 153; Ov. M. 13, 803; Plin. 21, 15, 54, § 91: spinae et tribuli,Vulg. Gen. 3, 18.
* A kind of water-plant bearing a prickly nut of a triangular form, water - chestnut, water - caltrops: Trapa natans, Linn.; Plin. 21, 16, 58, § 98.
Charlton T. Lewis, Charles Short, A Latin Dictionary
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