English Words Starting With F

• fresnel biprism

  nounVery low (C2+ Technical Vocabulary)
  /ˌfreɪˈnɛl ˈbaɪprɪz(ə)m/A prism consisting of two thin, base-to-base prisms with a very small refracting angle, used to split a single beam of light into two coherent beams for interference experiments.
• fresnel lens

  nounC2
  /ˌfreɪˈnɛl ˈlɛnz/A thin, lightweight optical lens composed of concentric annular sections, designed to reduce material and weight while maintaining a short focal length.
• fresnel mirrors

  plural-nounLow
  /ˌfreɪˈnɛl ˈmɪrəz/A pair of flat mirrors placed very close together at a slight angle, used to demonstrate optical interference by creating two coherent light sources from a single source.
• fresno

  nounLow
  /ˈfrɛznəʊ/A city in central California, USA.
• fress

  verb-intransitiveLow / Rare
  /frɛs/To eat heartily, greedily, or with excessive appetite, often used informally or humorously.
• fret

  nounverbverb-intransitiveverb-transitiveB2
  /fret/to be constantly or visibly worried or anxious; to erode or wear away.
• fret saw

  nounC2
  /ˈfret ˌsɔː/A saw with a narrow blade stretched on a frame, used for cutting intricate patterns in thin wood or metal.
• fretboard

  nounLow
  /ˈfret.bɔːd/The fretted fingerboard on a stringed instrument like a guitar, lute, or mandolin, where players press the strings against the frets to change the pitch of the notes.
• fretwork

  nounLow
  /ˈfrɛtwəːk/Ornamental design consisting of interlacing lines, typically cut into wood or metal.
• freud

  nounLow
  /frɔɪd/The surname of Sigmund Freud (1856–1939), the Austrian neurologist and founder of psychoanalysis.
• freudian

  adjectivenounC2
  /ˈfrɔɪ.di.ən/Of or relating to the psychoanalytic theories of Sigmund Freud.
• freudian slip

  nounC1
  /ˌfrɔɪ.di.ən ˈslɪp/An unintentional verbal error that reveals a subconscious thought or feeling.
• freund's adjuvant

  nounLow/Very Technical
  /ˌfrɔɪndz ˈædʒʊvənt/A water-in-mineral oil emulsion used in immunology to enhance the immune response to an antigen.
• frey

  nounC1
  /freɪ/a situation of intense activity, conflict, or disorder; also, to unravel or wear away at the edges.
• freya

  nounLow
  /ˈfreɪə/A proper noun referring to a major goddess in Norse mythology, associated with love, beauty, fertility, war, wealth, and magic.
• freyre

  nounVery Low
  /ˈfreɪ.ə/A term for a knight or brother in a religious military order, particularly in medieval Portugal.
• freytag

  nounVery low
  /ˈfraɪtɑːɡ/A German surname; most commonly refers to Gustav Freytag (1816–1895), a 19th-century German novelist, playwright, and literary theorist.
• friar

  nounC1
  /ˈfraɪə/A member of a religious order of men, particularly in the Roman Catholic Church, who lives a communal life in a monastery and serves the wider community, distinct from a monk who is typically more cloistered.
• friar minor

  nounLow
  /ˌfraɪə ˈmaɪnə/A member of the Franciscan order of the Catholic Church, specifically the Order of Friars Minor (OFM), founded by Saint Francis of Assisi.
• friar minor capuchin

  nounVery Low
  /ˌfraɪə ˌmaɪnə ˈkæpjʊtʃɪn/A member of the Order of Friars Minor Capuchin, a religious order within the Catholic Church that follows the Rule of Saint Francis of Assisi, characterized by a simple lifestyle, a brown habit with a pointed hood (cappuccio), and a beard.

Showing 5081–5100 of 5868 words.