terminology - Term for the second letter in Sx, Dx, Rx? - English
https://english.stackexchange.com/questions/314546/term-for-the-second-letter-in-sx-dx-rx
WebMar 18, 2016 · Sorted by: 10. It seems plausible that the medical convention of using 'x' as the second letter of an abbreviation (in, for example, Dx ( diagnosis ), Sx ( symptom or surgery ), Fx ( family ), Hx ( history ), and Tx ( transplant or treatment )) comes from copying the convention of using Rx as an abbreviation of prescription.
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