adjective
- containing, consisting of, or resembling silica or silicon dioxide
Usage: geological; scientific
Examples
- The siliceous rock formations contained high levels of quartz.
- Diatoms have siliceous cell walls made of microscopic glass-like structures.
- The geologist identified siliceous deposits in the ancient lake bed.
- Siliceous sponges use silicon dioxide to build their skeletal framework.
- The siliceous sediment accumulated over millions of years on the ocean floor.
- Chert is a hard, siliceous rock formed from compressed marine organisms.