pumice

pumice, pumice-stone: a light stone, thrown out of volcanoes: pūmex, ĭcis, m.: Hor. Ep. 1, 20, 2 (f. Cat. 1, 2): pl. p. rocks (used poet. of any rocks), (hiems) quae nunc oppositis debilitat pumicibus mare, Hor. Od. 1, 11, 5. Phr.: to smooth with p.-stone, pūmĭco, 1: Lucil. in Non. 95, 16: polished with p., e. g. hand, pumicata manus, Mart. 5, 41: forehead, p. frons, id. 1, 67. Adj of p.-stone, pumiceus: e. g. p. molae Ov. F. 6, 318: p. antra, Stat. S. 3, 1 144: fountains springing from p., p. fontes, Mart. 4, 57: eyes like pumice-stone (i. e. stony, dry), p. oculi, Pl. Ps. 1, 1, 73. Like p.-stone (i. e. porous), pumicosus: p. terra, Plin. 17, 5, 3 § 34: lapis, id. 36, 19, 34.