silica: meaning, definition, pronunciation and examples
C1Technical / Scientific / Industrial
Quick answer
What does “silica” mean?
A hard, glassy mineral compound, silicon dioxide (SiO₂), that is the main constituent of sand and quartz, and is used in making glass, concrete, and ceramics.
Audio
Pronunciation
Definition
Meaning and Definition
A hard, glassy mineral compound, silicon dioxide (SiO₂), that is the main constituent of sand and quartz, and is used in making glass, concrete, and ceramics.
The term can also refer to various forms of this compound, including amorphous silica (like diatomaceous earth) and crystalline forms (like quartz), which have different industrial and health implications.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences. Pronunciation differs slightly (see IPA).
Connotations
Identical technical/scientific connotations in both varieties.
Frequency
Equally low-frequency in general discourse but standard in relevant technical fields in both regions.
Grammar
How to Use “silica” in a Sentence
Silica is used in [product/process].[Product] contains silica.The [material] is rich in silica.Vocabulary
Collocations
Examples
Examples of “silica” in a Sentence
adjective
British English
- The silica content was analysed.
- A silica-based gel was used.
American English
- The silica content was analyzed.
- A silica-based gel was used.
Usage
Meaning in Context
Business
Discussed in manufacturing, construction materials, and workplace safety (e.g., 'silica dust regulations').
Academic
Common in geology, chemistry, materials science, and environmental health papers.
Everyday
Rare; might be encountered on product labels (e.g., 'silica gel' packets) or in news about health risks.
Technical
Precise term for the compound in engineering, industrial hygiene, and ceramics manufacturing.
Vocabulary
Synonyms of “silica”
Strong
Neutral
Weak
Vocabulary
Antonyms of “silica”
Watch out
Common Mistakes When Using “silica”
- Using 'silica' as a countable noun (e.g., 'a silica').
- Confusing 'silica' (the mineral) with 'silicone' (the synthetic rubber/plastic).
FAQ
Frequently Asked Questions
No. Silicon is a chemical element (Si). Silica is a compound containing silicon and oxygen (SiO₂).
Silica gel is a desiccant; its highly porous structure absorbs and holds moisture from the air, protecting products from dampness.
The primary hazard comes from inhaling fine, crystalline silica dust over long periods, which can scar lung tissue. Amorphous silica and solid forms present minimal risk.
Quartz, which is a crystalline form of silica, is extremely common in the Earth's crust.
A hard, glassy mineral compound, silicon dioxide (SiO₂), that is the main constituent of sand and quartz, and is used in making glass, concrete, and ceramics.
Silica is usually technical / scientific / industrial in register.
Silica: in British English it is pronounced /ˈsɪl.ɪ.kə/, and in American English it is pronounced /ˈsɪl.ɪ.kə/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think of SILICOn, the element it comes from, found in glass and SAND (both start with S). SILICA = SILIcon + sAnd.
Conceptual Metaphor
Often conceptualised as a fundamental, gritty building block (e.g., 'the silica of the industry').
Practice
Quiz
Which of the following is a common, everyday item that typically contains 'silica'?