English Words Starting With A

• acoustic theodolite

  nounVery Rare / Technical Jargon
  /əˌkuː.stɪk θiˈɒd.ə.laɪt/A surveying instrument that uses sound waves to measure distance and angles.
• acoustic torpedo

  nounC2 / Very Low Frequency
  /əˌkuː.stɪk tɔːˈpiː.dəʊ/A self-propelled naval torpedo that homes in on the sound generated by its target's propellers or machinery.
• acoustical cloud

  nounC2 / Low
  /əˈkuːstɪk(ə)l klaʊd/A decorative ceiling-mounted panel or array of panels designed to absorb sound and reduce reverberation in a room.
• acoustical surveillance

  nounLow
  /əˌkuː.stɪ.kəl səˈveɪ.ləns/The act or process of listening to, recording, or otherwise monitoring sounds or conversations, typically in a covert or secret manner for intelligence, security, or investigative purposes.
• acoustical tile

  nounC1
  /əˈkuː.stɪ.kəl taɪl/A manufactured panel, typically made from mineral fiber, fiberglass, foam, or wood, designed to absorb sound waves and reduce reverberation in a room.
• acoustician

  nounLow frequency (C2 level)
  /ˌæk.uːˈstɪʃ.ən/A scientist or engineer who specializes in the study of sound.
• acoustics

  nounB2
  /əˈkuːstɪks/The scientific study of sound, especially its production, transmission, and effects.
• acoustimeter

  nounC2/Very Low
  /əˌkuːˈstɪm.ɪ.tər/An instrument for measuring the intensity of sound.
• acoustooptics

  nounVery Low
  /əˌkuːstəʊˈɒptɪks/The branch of physics dealing with the interaction between sound waves and light waves.
• acquaint

  verbverb-transitiveB2
  /əˈkweɪnt/to make someone aware of or familiar with something; to provide with knowledge or experience.
• acquaintance

  nounB2
  /əˈkweɪntəns/Knowledge or experience of someone or something, especially through direct contact.
• acquaintance rape

  nounLow
  /əˈkweɪntəns reɪp/A sexual assault (rape) committed by someone known to the victim, such as a friend, colleague, or date.
• acquaintance violence

  nounlow
  /əˈkweɪn.təns ˈvaɪə.ləns/Violence committed by a person known to the victim but not a family member or intimate partner.
• acquest

  nounRare
  /əˈkwɛst/property or an asset that has been acquired, especially by purchase or gift rather than by inheritance.
• acquiesce

  verbverb-intransitiveC1
  /ˌæk.wiˈes/to accept something reluctantly but without protest.
• acquiesced

  verbC1
  /ˌækwiˈest/To accept or comply with something passively, without protest, often reluctantly or silently.
• acquiescence

  nounLow-Mid
  /ˌækwiˈesəns/Acceptance or agreement without protest or resistance.
• acquire

  verbverb-transitiveB2
  /əˈkwaɪə(r)/To obtain, gain, or come into possession of something, often through effort or over time.
• acquired behaviour

  nounC1
  /əˈkwaɪəd bɪˈheɪvjə/A behaviour or pattern of action that an organism learns from its environment or experience, as opposed to one that is innate or instinctive.
• acquired character

  nounLow
  /əˈkwaɪəd ˈkærəktə/A physical or behavioral trait of an organism that develops during its lifetime as a response to environmental factors, not inherited through genes.

Showing 901–920 of 8734 words.