See more synonyms on Thesaurus.com. noun, (used with a singular verb) 1. Biology. the science of heredity, dealing with resemblances and differences of related organisms resulting from the interaction of their genes and the environment.
Rx: A medical prescription. The symbol Rx is usually said to stand for the Latin word recipe meaning to take.. It is customarily part of the superscription (heading) of a prescription.
Sx Definition. Medical professionals routinely abbreviate terms when they fill out forms. Among the most common abbreviations used is Sx, which is shorthand for symptoms. Other frequently used abbreviations include Dx (diagnosis), Tx (treatment), Fx (fracture), Hx (history) and Rx (prescription).