χάλιξ

A. small stone, pebble, in pl., Arist. Fr. 213; ἐστρωμένη χάλιξιν ὁδός Luc. Trag. 226.

2. freq. as collect. in sg., gravel, rubble, used in building, Th. 1.93, PCair.Zen. 760 (iii B. C.), PPetr. 3p.290 (iii B. C.), Plu. Cim. 13; τῇ χ. καταμείξαντες τὴν ἀμμοκονίαν, so as to make concrete, Str. 5.4.6: pl., Ar. Av. 839; χ. σιδηραῖ dub. sens. in IG 12.314.44.