pūmĭcōsus

I. like pumice-stone, i. e. porous: terra, Plin. 17, 5, 3, § 34; Vitr. 2, 3: lapis, Plin. 36, 19, 34, § 141. —Comp.: halcyoneum, Plin. 32, 8, 27, § 86.