b. caltrops, Tribulus terrestris, Ar.Lys.576; τ. περικαρπιάκανθος, χερσαῖος, Thphr.HP3.1.6, 6.1.3, Dsc. l.c.; “ἄκανθαι καὶ τ.” LXX Ge.3.18; “βάτοι καὶ τ.” Ph.1.680, cf. IG14.1934f1 (Rome):—Alc.47 calls sour wine ὀξύτερος τριβόλων.
c. τ. φυλλάκανθος, thorny trefoil, Fagonia cretica, Thphr.HP6.5.3.
d. τ. παραθαλάσσιος, prickly samphire, Echinophora spinosa, Hp.Nat.Mul.32.
II. τρίβολοι, οἱ, a threshing-machine, a board with sharp stones fixed in the bottom, Ph.Bel.85.36, al., LXX 2 Ki.12.31, Longus 3.30; τ. ξύλινος (in the section περὶ κάρρων) Edict.Diocl.15.41; “τριβόλους ἀχυρότριβας” AP6.104 (Phil.).
III. caltrop, i. e. a four-spiked implement thrown on the ground to lame the enemy's horses, Ph.Bel.100.7, Plu.2.200a, Polyaen.1.39.2, 4.3.17, Hdn.4.15.2, Procop.Goth.3.24.
b. τ. πηχῶν έ a larger contrivance for stopping boulders, etc., thrown down a slope, Ath.Mech. 38.2.
c. οἱ κατακρημνώμενοι τ. an instrument hung from the walls of a fortress as a defence against battering-rams, Ph.Bel.100.15.
d. a kind of missile, “τριβόλων σιδηρῶν σφενδονῆται” D.H.20.1; οἱ τ. οἱ καιόμενοι a kind of incendiary missile, Ph.Bel.100.20, cf. 94.9.
IV. part of the bit of a bridle, PCair.Zen.782(a).9 (iii B. C.), Poll.1.148, Hsch.
VI. as Adj., three-tiered, “πυρὰ πυργοειδὴς τ.” D.C.74.5.