pĕnĕtrābĭlis, e, adj. [penetro].
I Pass. , that can be pierced or penetrated , penetrable (poet. and in post-Aug. prose): corpus nullo penetrabile telo, Ov. M. 12, 166: cum sit nulli penetrabilis, Sen. Const. Sap. 3: pectus ferro, Stat. Th. 2, 653: terra, Just. 4, 1, 2: caput haud penetrabile Nili, inaccessible , Stat. S. 3, 5, 21.—
II Act. , piercing , penetrating (poet. and in post-class. prose): Boreae penetrabile frigus, Verg. G. 1, 93: telum, id. A. 10, 481: harundo, Sil. 7, 649: fulmen, Ov. M. 13, 857: vinum penetrabilius in venas, Macr. 7, 12: querimonia, Gell. 10, 3, 4.— Comp. : sermo Dei est penetrabilior omni gladio ancipiti, Vulg. Heb. 4, 12.—
III = penetralis (late Lat.): ad regni penetrabilia, Laurent. Hom. 1.