English Words Starting With F

• freneau

  nounVery Low
  /ˈfriːnəʊ/A proper noun, typically referring to a surname of French origin.
• frenemy

  nounC1
  /ˈfrɛnəmi/A person who is ostensibly a friend but also acts as a rival or adversary.
• frenet formula

  nounVery Low
  /ˌfreɪˈneɪ ˈfɔː.mjə.lə/A set of mathematical equations, often called the Frenet–Serret formulas, that describe the kinematic properties of a particle moving along a continuous, differentiable curve in three-dimensional space. They define the curve's tangent, normal, and binormal unit vectors, and their derivatives with respect to arc length.
• frenkel defect

  nounC2
  /ˈfrɛŋkəl ˈdiːfɛkt/A specific type of point defect in a crystal lattice where an atom moves from its regular site to an interstitial site, leaving behind a vacancy.
• frenulum

  nounC2
  /ˈfrɛnjʊləm/A small fold or band of mucous membrane that restrains the movement of a mobile organ in the body.
• frenum

  nounC2
  /ˈfriːnəm/A small fold of tissue that restricts the movement of an organ or part, most commonly referring to the fold under the tongue or upper lip.
• frenzy

  nounverbverb-transitiveB2
  /ˈfren.zi/A state or period of uncontrolled excitement, wild or chaotic behaviour, or intense agitation.
• freon

  nounC1
  /ˈfriːɒn/A trademarked name for a class of non-flammable, non-toxic chemical compounds (chlorofluorocarbons, or CFCs) historically used as refrigerants and propellants.
• frequency

  nounB2
  /ˈfriːkwənsi/The rate at which something happens or is repeated over a particular period of time.
• frequency band

  nounB2
  /ˈfriːkwənsi bænd/A specific, continuous range of frequencies within the electromagnetic spectrum.
• frequency curve

  nounC1
  /ˈfriːkwənsi kɜːv/A graphical representation showing the distribution of values for a variable, where the height of the curve at any point represents the frequency of occurrence of that value.
• frequency distribution

  nounC1
  /ˈfriːkwənsi ˌdɪstrɪˈbjuːʃən/A statistical representation showing how often each value or range of values occurs in a dataset.
• frequency modulation

  nounLow (technical term)
  /ˈfriː.kwən.si ˌmɒd.jʊˈleɪ.ʃən/A method of encoding information in a carrier wave by varying its instantaneous frequency.
• frequency polygon

  nounC1/C2
  /ˈfriːkwənsi ˈpɒlɪɡən/A statistical graph constructed by connecting the midpoints of the tops of adjacent bars in a histogram with straight lines.
• frequency response

  nounC1
  /ˈfriːkwənsi rɪˈspɒns/The quantitative measure of the output spectrum of a system or device in response to a stimulus, showing how its amplitude and phase vary with frequency.
• frequency-division multiplex

  nounLow/C2
  /ˈfriː.kwən.si dɪˌvɪʒ.ən ˈmʌl.tɪ.pleks/A method of transmitting multiple independent signals over a single communication channel by dividing the channel's bandwidth into distinct, non-overlapping frequency bands.
• frequent

  adjectiveverbverb-transitiveB1
  /ˈfriːkwənt/ (adj), /friˈkwent/ (verb)Occurring or done on many occasions, in many cases, or in quick succession.
• frequent flier

  nounC1
  /ˌfriːkwənt ˈflaɪə/A person who travels by air regularly, often earning rewards through an airline's loyalty program.
• frequentation

  nounLow (Rare)
  /ˌfriː.kwenˈteɪ.ʃən/The action of visiting or attending a place often or habitually.
• frequentative

  adjectivenounLow (C2)
  /frɪˈkwen.tə.tɪv/In linguistics, a verb or verb form expressing repeated or habitual action.

Showing 5041–5060 of 5868 words.