Containing or resembling silica, or having its general character.

In zoology, containing or consisting of silica or silicious substance in one or another form: as, silicious sponges; silicious sponge-spicules; the silicious test or skeleton of various protozoans, especially radiolarians.

adjective. See siliceous.

adjective. Alternative spelling of siliceous.

adjective. relating to or containing or resembling silica

"These creatures, to judge from the shrivelled remains that have fallen into human hands, were bipeds with flimsy, silicious skeletons almost like those of the silicious sponges and feeble musculature, standing about six feet high and having round, erect heads, and large eyes in flinty sockets."

silicious earth  silicious sinter  silicious waters  

aluminous  basaltic  ferruginous  fine-grained  friable  

siliceous