English Words Starting With A

• acupoint

  nounC1
  /ˈæk.juː.pɔɪnt/A specific point on the body used in acupuncture and acupressure for treatment.
• acupressure

  nounC1
  /ˈæk.jʊ.preʃ.ər/A form of alternative therapy that involves applying physical pressure to specific points on the body (acupoints) to relieve pain, tension, and promote wellness.
• acupuncture

  nounverb-transitiveC1
  /ˈæk.jʊ.pʌŋk.tʃər/A traditional Chinese medical treatment that involves inserting very thin needles into specific points on the body to relieve pain or treat illness.
• acupuncturist

  nounC1
  /ˌækjʊˈpʌŋktʃərɪst/A person trained and qualified to practise acupuncture.
• acus

  nounVery Low
  /ˈeɪ.kəs/(Archaic) A needle; a sharp, pointed instrument for sewing, medical, or technical use.
• acusector

  nounVery Rare / Obsolete
  /ˌækjʊˈsɛktə/A rare or obsolete term for a surgical instrument or device used for cutting or incising.
• acutance

  nounVery Low
  /əˈkjuːt(ə)ns/The sharpness or clarity of an edge in a photographic or printed image.
• acute

  adjectivenounC1
  /əˈkjuːt/Sharp or severe in effect; intensely felt.
• acute accent

  nounLow
  /əˈkjuːt ˈæk.sənt/A diacritical mark (´) placed over certain letters to indicate specific phonetic qualities, such as vowel quality or stress.
• acute arch

  nounC1+ / Very Low Frequency
  /əˌkjuːt ˈɑːtʃ/An arch with an angle less than 90 degrees, forming a sharp point at the top.
• acute dose

  nounC1
  /əˈkjuːt dəʊs/A single, significant exposure to a harmful agent, such as radiation or a toxic substance, occurring over a short period of time (typically within 24 hours).
• acute necrotizing gingivitis

  nounVery low frequency (technical/medical term)
  /əˌkjuːt ˈnek.rə.taɪ.zɪŋ ˌdʒɪn.dʒɪˈvaɪ.tɪs/A severe, rapidly progressing bacterial infection of the gums characterized by tissue death (necrosis), ulceration, pain, and bleeding.
• acute respiratory distress syndrome

  nounVery Low / Specialized
  /əˌkjuːt rɪˈspɪr.ə.tər.i dɪˈstres ˌsɪn.drəʊm/A severe, life-threatening lung condition where fluid leaks into the lungs, preventing them from working properly and depriving the body of oxygen.
• acute stress disorder

  nounC2
  /əˈkjuːt strɛs dɪsˈɔːdə/A short-term psychological condition triggered by experiencing or witnessing a terrifying event, characterized by severe anxiety, dissociation, and intrusive memories, typically lasting from 3 days to 1 month after the trauma.
• acuteness

  nounC1-C2 / Academic / Formal
  /əˈkjuːtnəs/The quality of being sharp, intense, or severe.
• acyclovir

  nounC2 / Specialized Medical / Low-frequency
  /eɪˈsaɪ.klə(ʊ)ˌvɪə/A synthetic antiviral drug used primarily to treat herpes simplex virus infections and herpes zoster (shingles).
• acyl

  adjectivenounC2/Advanced
  /ˈeɪ.saɪl/A functional group derived from a carboxylic acid by removal of a hydroxyl group; specifically, the R–C=O group.
• acyl anhydride

  nounVery Low
  /ˌeɪ.saɪl ænˈhaɪ.draɪd/A chemical compound formed by the removal of water from two carboxylic acid molecules, resulting in a functional group with the structure R-C(O)-O-C(O)-R'.
• acyl group

  nounC2
  /ˈeɪ.saɪl ˌɡruːp/A functional group in organic chemistry derived from a carboxylic acid by removal of a hydroxyl group (-OH).
• acyl halide

  nounLow/Very Low
  /ˌeɪ.saɪl ˈheɪ.laɪd/An organic compound derived from a carboxylic acid in which the hydroxyl group (‑OH) has been replaced by a halogen atom (e.g., chlorine, bromine).

Showing 1121–1140 of 8734 words.