silica

S1I1L1I1C3A1
UK/ˈsɪl.ɪ.kə/

noun

Silicon dioxide.

Similar
E551 when used as an anti-caking agentsilicon oxidesilicon dioxide
Less commonFirst used 1801Scrabble 8

Meanings

nounsilica (countable and uncountable, plural silicas)

plural silicas

  1. countableuncountableSilicon dioxide.First known use 1801
  2. countableuncountableAny of the silica group of the silicate minerals.

    Its Blair County property was sited at the foot of ganister-covered Dunnings Mountain to compete with the Mount Union plants making silica bricks for the steel industry.

    1993, Historic American Building Survey, Town of Clayburg: Refractories Company Town, National Park Service, 2

Synonyms & antonyms

Similar
E551 when used as an anti-caking agent

nouna white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite

Broader

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinsilex“hard stone, flint”
  2. New Latinsilica
  3. Englishsilica

From New Latin silica, from Latin silex (“hard stone, flint”), on model of alumina, soda.

Full word history & related roots →

Translations

Bulgarian силициев диоксид, кварц
  • силициев диоксид (siliciev dioksid)silicon dioxide
  • кварц (kvarc)silica group of the silicate minerals
Catalan sílice
  • sílicesilicon dioxide
Chinese Mandarin 二氧化硅
  • 二氧化硅 (èryǎnghuàguī)silicon dioxide
Esperanto siliko, siliko
  • silikosilicon dioxide
  • silikosilica group of the silicate minerals
Finnish piidioksidi, silika
  • piidioksidisilicon dioxide
  • silikasilicon dioxide
  • hohkasilikaattisilica group of the silicate minerals
French silice
  • silicesilicon dioxide
Italian silice, silice
  • silicesilicon dioxide
  • silicesilica group of the silicate minerals
Japanese シリカ
  • シリカ (shirika)silicon dioxide
Persian سیلیس
  • سیلیس (silis)silicon dioxide
Portuguese sílica
  • sílicasilicon dioxide
Romanian silică
  • silicăsilicon dioxide
Russian кремнезём
  • кремнезём (kremnezjóm)silicon dioxide
Spanish sílice, sílice
  • sílicesilicon dioxide
  • sílicesilica group of the silicate minerals
Swedish kiseldioxid
  • kiseldioxidsilicon dioxide

Rhymes & wordplay

Anagrams

Cite this entry
APA

silica. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/silica

MLA

“silica.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/silica. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “silica,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/silica.

Source: silica on Wiktionary, CC BY-SA 4.0.