English Words Starting With Q

• quantity

  nounB2 (Upper Intermediate)
  /ˈkwɒntəti/A measurable or countable amount of something.
• quantity surveyor

  nounC2
  /ˈkwɒntɪti səˈveɪə/A construction industry professional who estimates and manages project costs and materials.
• quantity theory

  nounC1/C2
  /ˈkwɒntɪti ˈθɪəri/The economic hypothesis that the general price level of goods and services is directly proportional to the amount of money in circulation.
• quantize

  verbverb-transitiveC2/Technical
  /ˈkwɒn.taɪz/To restrict a variable quantity (like a signal or measurement) to a set of discrete, specific values.
• quantized

  adjectiveverbC2
  /ˈkwɒntaɪzd/Describing a quantity (especially a physical property like energy, charge, or data) restricted to discrete, specific values rather than a continuous range.
• quantometer

  nounVery Low (Specialist Technical Term)
  /kwɒnˈtɒmɪtə/A specialized scientific instrument for quantitative chemical analysis, specifically for determining the metallic content in alloys or for conducting rapid, simultaneous analysis of multiple elements in a sample using spectroscopy.
• quantong

  nounNot Found
  This word does not exist in standard English dictionaries, Oxford English Dictionary, Merriam-Webster, Collins, Cambridge Dictionary, or Macmillan. It appears to be a nonce word or potential neologism.
• quantrill

  nounVery low
  /ˈkwɒntrɪl/A proper noun referring to William Clarke Quantrill, a Confederate guerrilla leader during the American Civil War, infamous for his brutality.
• quantum

  adjectivenounC1
  /ˈkwɒntəm/A discrete and indivisible quantity or unit of something, especially in physics where it is the minimum amount of any physical entity involved in an interaction. A fundamental, discrete unit.
• quantum bit

  nounC2
  /ˈkwɒn.təm bɪt/The fundamental unit of quantum information, which can exist not only in states 0 or 1 (like a classical bit) but also in a superposition of both states simultaneously.
• quantum chemistry

  nounLow
  /ˈkwɒn.təm ˈkem.ɪ.stri/A branch of theoretical chemistry that applies quantum mechanics and quantum field theory to chemical problems, particularly to explain the behaviour of electrons in molecules.
• quantum chromodynamics

  nounRare
  /ˌkwɒntəm ˌkrəʊməʊdaɪˈnæmɪks/The theory within the Standard Model of particle physics that describes the strong nuclear force, which binds quarks and gluons together to form hadrons such as protons and neutrons.
• quantum computer

  nounLow
  /ˌkwɒn.təm kəmˈpjuː.tər/A computer that uses quantum-mechanical phenomena, such as superposition and entanglement, to perform computation.
• quantum cryptography

  nounC2
  /ˈkwɒntəm krɪpˈtɒɡrəfi/A method of secure communication that uses principles of quantum mechanics to encrypt and transmit information in a way that makes eavesdropping detectable.
• quantum efficiency

  nounC2
  /ˈkwɒn.təm ɪˈfɪʃ.ən.si/The ratio of the number of charge carriers (electrons or holes) collected by a photosensitive device to the number of photons incident on its surface. It measures how effectively a device converts incoming light into an electrical signal.
• quantum electrodynamics

  nounVery low (Specialised technical term)
  /ˌkwɒn.təm ɪˌlek.trəʊ.daɪˈnæm.ɪks/The quantum field theory that describes how light and matter interact, specifically the interaction between electrons, photons, and electromagnetic fields.
• quantum electronics

  nounLow
  /ˌkwɒn.təm ɪˌlekˈtrɒn.ɪks/A branch of physics that deals with the application of quantum mechanics to the design and function of electronic devices.
• quantum field theory

  nounC2 (Specialized)
  /ˌkwɒn.təm ˈfiːld ˌθɪə.ri/A theoretical framework in physics that constructs quantum mechanical models of subatomic particles and forces as excitations in underlying fields.
• quantum flavourdynamics

  nounVery Low
  /ˌkwɒn.təm ˌfleɪ.və.daɪˈnæm.ɪks/A theoretical framework in particle physics that describes the interactions of the flavour quantum numbers of quarks via the strong force.
• quantum gravity

  nounC2
  /ˈkwɒntəm ˈɡrævəti/A theoretical framework of physics that aims to describe the gravitational force according to the principles of quantum mechanics.

Showing 201–220 of 698 words.