English Words Starting With I

• inverse cotangent

  nounVery Low
  /ˌɪn.vɜːs kəʊˈtæn.dʒənt/A mathematical function that gives the angle whose cotangent is a given number.
• inverse function

  nounC2+
  /ˌɪn.vɜːs ˈfʌŋk.ʃən/A function that reverses the action of another function; if f maps x to y, then its inverse f⁻¹ maps y back to x.
• inverse image

  nounRare
  /ˈɪnvɜːs ˈɪmɪdʒ/The set of all elements in a function's domain that map to a given subset of its codomain.
• inverse-square law

  nounLow
  /ˌɪn.vɜːs ˈskweə ˌlɔː/A physical principle stating that a specified physical quantity or intensity is inversely proportional to the square of the distance from the source of that physical quantity.
• inversion

  adjectivenounC1
  /ɪnˈvɜː.ʃən/The action of turning something upside down or reversing the order, position, direction, or relationship of things.
• inversion casting

  nounVery Rare
  /ɪnˈvɜːʃən ˈkɑːstɪŋ/A specialised casting process where the mould is inverted (turned upside down) after the molten metal is poured, typically to reduce defects.
• inversion layer

  nounC1/C2
  /ɪnˈvɜː.ʃən ˌleɪ.ər/A meteorological phenomenon where a layer of warm air sits above a layer of cooler air, reversing the normal atmospheric temperature gradient and trapping pollutants near the ground.
• inversion therapy

  nounC1
  /ɪnˈvɜːʃən ˈθɛrəpi/A therapeutic technique where a person is suspended upside down, using gravity to relieve spinal pressure.
• invert

  adjectivenounverbverb-intransitiveverb-transitiveC1
  /ɪnˈvɜːt/To turn something upside down or inside out; to reverse the position, order, or condition of something.
• invert soap

  nounC2
  /ˈɪnvɜːt səʊp/A chemical substance, specifically a cationic surfactant, where the charge distribution is opposite to that of ordinary soap.
• invert sugar

  nounC1
  /ˌɪnvɜːt ˈʃʊɡə/A mixture of glucose and fructose produced by hydrolyzing sucrose, used as a sweetener.
• invertase

  nounLow
  /ɪnˈvɜː.teɪz/An enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose.
• invertebrate

  adjectivenounC1
  /ɪnˈvɜː.tɪ.brət/An animal lacking a backbone or spinal column.
• inverted comma

  nounB2
  /ɪnˌvɜː.tɪd ˈkɒm.ə/A punctuation mark (' ' or " ") used to indicate direct speech, a quotation, or to highlight a word or phrase for a specific purpose.
• inverted mordent

  nounVery Low
  /ɪnˈvɜːtɪd ˈmɔːdənt/A musical ornament consisting of a rapid alternation between a principal note and the note above it.
• inverted pleat

  nounRare
  /ɪnˈvɜː.tɪd ˈpliːt/A type of fold in fabric where the folded edges face each other and meet at the center on the underside, creating a box-like appearance on the right side.
• inverted snob

  nounLow
  /ɪnˌvɜːtɪd ˈsnɒb/A person who deliberately rejects or criticizes what is considered refined, cultured, or high-class, often preferring or championing what is ordinary, simple, or working-class.
• inverter

  nounMedium
  /ɪnˈvɜːtə(r)/A device or circuit that converts direct current (DC) into alternating current (AC).
• invertible counterpoint

  nounVery Low
  /ɪnˌvɜː.tə.bəl ˈkaʊn.tə.pɔɪnt/In music, a compositional technique where two or more melodic lines (counterpoint) can be interchanged in register (e.g., the upper line can become the lower, and vice versa) while maintaining correct harmonic and contrapuntal relationships.
• invertor

  nounLow
  /ɪnˈvɜːtə/A device or circuit that converts direct current (DC) into alternating current (AC).

Showing 2801–2820 of 3621 words.