English Words Starting With A

• acorn worm

  nounVery Low
  /ˈeɪ.kɔːn ˌwɜːm/A marine worm of the phylum Hemichordata, characterized by a proboscis resembling an acorn, a collar, and a long, slender trunk.
• acotyledon

  nounRare
  /eɪˌkɒtɪˈliːd(ə)n/A plant lacking seed leaves (cotyledons).
• acouasm

  nounRare / Specialised
  /əˈkuː.æz.əm/A hallucinated ringing or buzzing sound in the ears; a simple form of auditory hallucination.
• acouchi

  nounVery Low (C2/Technical)
  /əˈkuːtʃi/A small, diurnal rodent of the genus Myoprocta, native to South American rainforests, resembling a large rat or a small agouti, with a slender body, long legs, and a short tail.
• acousma

  nounVery Low (Technical/Jargon)
  /əˈkuːzmə/A simple hallucination of a sound, especially a voice or isolated noise, in the absence of an external stimulus.
• acoustic

  adjectivenounB2
  /əˈkuːstɪk/Relating to sound, hearing, or the science of sound.
• acoustic coupler

  nounLow
  /əˌkuː.stɪk ˈkʌp.lə/A hardware device that connects a computer terminal or modem to a telephone line by converting digital signals into audible tones and vice versa, using the telephone handset as the interface.
• acoustic feature

  nounC1/C2
  /əˌkuː.stɪk ˈfiː.tʃər/A distinct, measurable property of a sound, such as its frequency, duration, amplitude, or spectrum, often analysed in fields like phonetics, music, and engineering.
• acoustic feedback

  nounC1
  /əˌkuːstɪk ˈfiːdbæk/The loud, high-pitched squeal or howl that occurs when the sound from a loudspeaker is picked up by a microphone and re-amplified in a continuous loop.
• acoustic guitar

  nounB2
  /əˌkuː.stɪk ɡɪˈtɑː/A guitar that produces sound acoustically by transmitting the vibration of the strings to the air via a hollow body, rather than through electrical amplification.
• acoustic impedance

  nounLow (Specialist Technical Term)
  /əˌkuː.stɪk ɪmˈpiː.dəns/A physical property that describes how much a medium resists acoustic flow when a sound wave passes through it; the ratio of sound pressure to particle velocity.
• acoustic mine

  nounC2
  /əˈkuːstɪk maɪn/A naval mine that is triggered by the sound of a ship's engines or propellers.
• acoustic nerve

  nounC1-C2 (Specialist/Technical)
  /əˌkuːstɪk ˈnɜːv/The eighth cranial nerve (vestibulocochlear nerve) responsible for transmitting sound and balance information from the inner ear to the brain.
• acoustic neuroma

  nounLow / Very low
  /əˌkuːstɪk njʊəˈrəʊmə/A benign (non-cancerous) tumour that develops on the nerve responsible for hearing and balance, typically found where the nerve connects the inner ear to the brain.
• acoustic ohm

  nounVery low/C2+ (Highly specialized technical term)
  /əˈkuːstɪk əʊm/A unit of acoustic impedance, defined as the impedance of a medium in which a sound pressure of one microbar produces a volume velocity of one cubic centimeter per second.
• acoustic phonetics

  nounC2
  /əˌkuːstɪk fəˈnetɪks/The branch of phonetics that deals with the physical properties of speech sounds — how they are produced, transmitted, and received — focusing on measurable aspects like frequency, amplitude, and duration.
• acoustic reactance

  nounC1/C2
  /əˌkuː.stɪk riˈæk.təns/In acoustics, the opposition to the flow of sound energy due to the inertia or elasticity of the medium, which causes the sound pressure and particle velocity to be out of phase.
• acoustic resistance

  nounVery low (C2)
  /əˈkuːstɪk rɪˈzɪst(ə)ns/In physics and engineering, the opposition that a medium or a system presents to the flow of acoustic energy or sound waves; a measure of how much a material or structure resists sound transmission.
• acoustic shock

  nounC2
  /əˌkuːstɪk ˈʃɒk/A sudden, traumatic auditory event causing psychological and physiological symptoms, often from an unexpected loud noise through headphones/headset.
• acoustic spectrography

  nounVery Low
  /əˌkuː.stɪk spɛkˈtrɒɡ.rə.fi/A technique for visually analysing the frequency, intensity, and duration of sound waves.

Showing 881–900 of 8734 words.