siliceus
Could not find silicea in Logeion dictionaries.
silicea feminine nominative singular, neuter nominative plural, feminine vocative singular, neuter accusative plural, neuter vocative plural, feminine ablative singular of siliceus
sĭlĭcĕus, a, um, adj. [silex],
- of flint or limestone, silicious: saxa, Vitr. 8, 3 fin.: lapides, Cato R. R. 18, 3.—Trop.: cor, Laev. ap. Gell. 19, 7, 10.
siliceus, a, um (silex), aus Kiesel, Kiesel-, saxa, Vitr. 8, 3, 19: lapides, Cato r. r. 18, 3 codd. (Schneider lapides silices).
sĭlĭcĕus, a, um, de silex : Cato Agr. 18, 3 ; Vitr. Arch. 8, 3, 19 || [fig.] quis tam siliceo (est) ? Læv. d. Gell. 19, 7, 10, qui est assez dur ? [siliceum n. , nature siliceuse] ; v. siliceo.