tribolos

τρίβολος [ῐ], ὁ,
name of various prickly plants,
a water-chestnut, Trapa natans, τ. ἔνυδρος Refs 4th c.BC+
b caltrops, Tribulus terrestris, Refs 5th c.BC+; τ. περικαρπιάκανθος, χερσαῖος, LXX+7th c.BC+
c τ. φυλλάκανθος, thorny trefoil, Fagonia cretica, Refs 4th c.BC+
d τ. παραθαλάσσιος, prickly samphire, Echinophora spinosa, Refs 5th c.BC+
II τρίβολοι, οἱ, a threshing-machine, a board with sharp stones fixed in the bottom, LXX+3rd c.BC+; τ. ξύλινος (in the section περὶ κάρρων) Refs 1st c.AD+
III caltrop, i. e. a four-spiked implement thrown on the ground to lame the enemy's horses, Refs 3rd c.BC+
III.b τ. πηχῶν έ a larger contrivance for stopping boulders, etc., thrown down a slope, Refs 2nd c.BC+
III.c οἱ κατακρημνώμενοι τ. an instrument hung from the walls of a fortress as a defence against battering-rams, Refs 3rd c.BC+
III.d a kind of missile, τριβόλων σιδηρῶν σφενδονῆται Refs 1st c.BC+; οἱ τ. οἱ καιόμενοι a kind of incendiary missile, Refs 3rd c.BC+
IV part of the bit of a bridle, Refs 3rd c.BC+
V uncertain meaning in naval dockyard records, σίδηρος ἐκ τοῦ τ. Refs
VI as adjective, three-tiered, πυρὰ πυργοειδὴς τ. Refs 2nd c.AD+

H. G. Liddell, R. Scott, H. S. Jones, A Greek-English Lexicon (9th ed., 1925–1940) — digitised by the Perseus Digital Library and corrected and expanded by Tyndale House, Cambridge, via STEPBible-Data's TFLSJ table, CC BY 4.0. Covers all of Greek literature, not just the Bible.