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Pronunciation follows convention outside the medical field, in which acronyms are generally pronounced as if they were a word (JAMA, SIDS), initialisms are generally pronounced as individual letters (DNA, SSRI), and abbreviations generally use the expansion (soln. = "solution", sup. = "superior").
Abbreviation Meaning h: hr / hours H: histamine or its receptors (if with subscripts) hemagglutinin: H x: history: HA ; H/A hypertonia arterialis headache calcium hydroxyapatite HAA: hepatitis-associated antigen or #History As Above HAART: highly active antiretroviral therapy HACA: human anti-chimeric antibody: HACE: High-altitude cerebral ...
U&E: urea and electrolytes (blood test) (for sodium and potassium, and often creatinine) UFE: Uterine Fibroid Embolization UIP: usual interstitial pneumonitis: UGI: upper gastrointestinal: ULN: upper limit of normal UMN: upper motor neuron: UNOS: United Network for Organ Sharing: UOP, UO, U/O: urinary output Ung: ointment (from Latin unguentum ...
febris e causa ignota (normally written as febris E.C.I.) fever of unknown origin ECLS: extracorporeal life support: ECMO: extracorporeal membrane oxygenation: ECP: emergency care practitioner: ECT: electroconvulsive therapy: ECTR: endoscopic carpal tunnel release: ED: eating disorder emergency department erectile dysfunction ectodermal ...
D/T: due to DTA: descending thoracic aorta: DTaP: diphtheria–tetanus–acellular pertussis (combined vaccination) DTP: diphtheria-tetanus-pertussis (combined vaccination) DTR: deep tendon reflex: DTs: delirium tremens: DU: duodenal ulcer (see peptic ulcer) DUB: dysfunctional uterine bleeding: DVT: deep vein thrombosis: D/W: discussed with DW ...
Abbreviation Meaning T: Thoracic Vertebrae. Testosterone. T x: Treatment: T3 Triiodothyronine: T4 Thyroxine: TA: temporal arteritis T&A: tonsillectomy with adenoidectomy: T&C: type and cross-match (see blood transfusion) T&S: type and screen (blood; e.g., to prepare for blood transfusion) Tab: Tablet (pharmacy) TAB Therapeutic abortion ...
ln(r) is the standard natural logarithm of the real number r. Arg(z) is the principal value of the arg function; its value is restricted to (−π, π]. It can be computed using Arg(x + iy) = atan2(y, x). Log(z) is the principal value of the complex logarithm function and has imaginary part in the range (−π, π].
The natural logarithm of x is generally written as ln x, log e x, or sometimes, if the base e is implicit, simply log x. [2] [3] Parentheses are sometimes added for clarity, giving ln(x), log e (x), or log(x). This is done particularly when the argument to the logarithm is not a single symbol, so as to prevent ambiguity.