πῶρος

English (LSJ)

ὁ, a

   A stone used in building, described by Thphr.Lap.7 (where πόρος), Plin.HN36.132, as a kind of marble, like the Parian in colour and solidity, but lighter; but ἐπιχώριος π., of the local conglomerate of Olympia, Paus.5.10.2; πώρου cj. for πόρου in Gal. 6.57 (= Orib.5.1.4); cf. πώρινος λίθος: pl., of stone used for substructures, IG7.3073.9, al. (Lebad., ii B.C.); τῶν εἰς τὰν στοιβὰν π. ib.42(1).106i17 (Epid., iv B.C.); τῶν εἰς τὰ ἀντιθέματα π. τομᾶς ib. 71.    2 stalactite in caverns, Arist.Mete.388b26.    3 chalkstone, formed in the joints, Id.HA521a21, Dsc.5.93.    4 stone in the bladder, Hp.Nat.Hom.14, Ruf.Ren.Ves.13.    5 metaph., πῶροι γῆς τὰ μάρμαρα M.Ant.9.36.