English Words Starting With C

• calcium oxide

  nounC1/C2 (Specialised Technical)
  /ˈkælsiəm ˈɒksaɪd/A white crystalline solid produced by heating limestone (calcium carbonate), with chemical formula CaO. It is a highly reactive alkaline compound, commonly known as quicklime or burnt lime.
• calcium permanganate

  nounTechnical/Low-Frequency
  /ˈkælsiəm pɜːˈmæŋɡəneɪt/A chemical compound consisting of calcium ions and permanganate ions (Ca(MnO₄)₂), primarily used as a strong oxidizing agent in chemistry, water treatment, and disinfection.
• calcium phosphate

  nounC1
  /ˈkælsiəm ˈfɒsfeɪt/A mineral compound consisting of calcium and phosphate ions, essential for the formation of bones and teeth.
• calcium propionate

  nounSpecialized/Technical
  /ˈkælsiəm ˈprəʊpiəneɪt/A calcium salt of propionic acid, used as a food preservative to inhibit mould and bacterial growth.
• calcium silicate

  nounLow
  /ˈkælsiəm ˈsɪlɪkeɪt/A chemical compound consisting of calcium, silicon, and oxygen atoms, commonly found as white or off-white powders or crystals.
• calcium sulfide

  nounC1/C2
  /ˈkælsiəm ˈsʌlfaɪd/An inorganic chemical compound with the formula CaS, consisting of calcium and sulfur.
• calcrete

  nounLow
  /ˈkalkriːt/A hardened layer of soil or sediment cemented by calcium carbonate, typically found in arid or semi-arid regions.
• calcsinter

  nounVery Low
  /ˈkælksɪntə/A hard, porous deposit formed by precipitation from mineral-rich water, typically calcium carbonate.
• calcspar

  nounVery Low / Obsolete Technical
  /ˈkælkspɑː/A pure, transparent, and crystalline form of calcite (calcium carbonate).
• calculate

  verbverb-intransitiveverb-transitiveB1
  /ˈkalkjʊleɪt/To determine a numerical value through mathematical operations.
• calculated risk

  nounB2-C1
  /ˈkælkjəleɪtɪd rɪsk/A risk that has been carefully considered and accepted after weighing potential gains against potential losses.
• calculating machine

  nounC1
  /ˈkælkjʊleɪtɪŋ məˈʃiːn/A mechanical or electronic device designed to perform arithmetic operations automatically.
• calculation

  nounB2
  /ˌkalkjʊˈleɪʃ(ə)n/The process of using mathematics or reasoning to determine a numerical result, quantity, or value.
• calculator

  nounB1
  /ˈkalkjʊleɪtə/A device used for performing mathematical calculations, often electronic and hand-held.
• calculus

  nounC1
  /ˈkalkjʊləs/A branch of mathematics that deals with the study of change, focusing on derivatives (differential calculus) and the accumulation of quantities (integral calculus).
• calculus of finite differences

  nounVery low
  /ˈkælkjʊləs əv ˈfaɪnaɪt ˈdɪf(ə)rənsɪz/A branch of mathematics that deals with the study of discrete changes, analogous to differential calculus but applied to sequences or functions defined on discrete points.
• calculus of variations

  nounC2
  /ˈkælkjʊləs əv ˌveə.riˈeɪ.ʃənz/A branch of mathematical analysis that deals with finding functions that optimize (maximize or minimize) functionals, which are typically integrals involving the unknown function and its derivatives.
• calcutta

  nounC2
  /kælˈkʌtə/The former official name for the major city in eastern India, now officially called Kolkata; it specifically refers to the historical and cultural identity of the city during the British colonial period.
• calcutta cup

  nounLow
  /kælˌkʌtə ˈkʌp/The rugby union trophy contested annually between England and Scotland.
• caldarium

  nounRare
  /kalˈdɛːrɪəm/In ancient Roman baths, the hottest room with a hot plunge bath.

Showing 461–480 of 13732 words.