The fourth letter of the English alphabet, called dee and written in the Latin script. Greater roman numeral symbol: m ( “ 1000 ” )Įtymology 3 Pronunciation ĭ ( lower case, upper case D, plural ds or d's). Lesser roman numeral symbol: c ( “ 100 ” ). With a bar over the numeral, i.e., as d, it represents five hundred thousand (500,000). Lower case form of upper case roman numeral D, a standardization of D or Ð, from tally stick markings resembling a superimposed Ɔ and ⋌, from the practice of encircling each hundredth ⋌ notch.ĭ ( lower case Roman numeral, upper case D) ( select similar letters and symbols ) ∂ ₫ ð. ( Latin script ): A a B b C c D d E e F f G g H h I i J j K k L l M m N n O o P p Q q R r S ſ s T t U u V v W w X x Y y Z z. In some languages and transcription systems, d may also represent other sounds, such as /t/ or /ð/. The letter d is used in the alphabets of many languages, and in several romanization systems of non-Latin scripts to represent the voiced alveolar or dental plosive ( /d/). The fourth letter of the basic modern Latin alphabet. Modification of capital letter D, from Ancient Greek letter Δ ( D, “ Delta ” ). Madison (WI): University of Wisconsin Hospitals and Clinics Authority c2020. Pulmonary ventilation/perfusion scan: Overview. Gainesville (FL): University of Florida Health c2020. UF Health: University of Florida Health. Rochester (NY): University of Rochester Medical Center c2020. University of Rochester Medical Center. Health Encyclopedia: Computed Tomography Angiography. Never ignore extremely elevated D-dimer levels they are specific for serious illness. Radiological Society of North America, Inc. Department of Health and Human Services Blood Tests. National Heart, Lung, and Blood Institute. Gaithersburg (MD): National Blood Clot Alliance How Is DVT Diagnosed?. 
Washington D.C.: American Association for Clinical Chemistry c2001–2020.
Washington D.C.: American Society of Hematology c2020. Symptoms and Diagnosis of Venous Thromboembolism (VTE). Dallas (TX): American Heart Association Inc.
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