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.
â is a symbol meaning prescription. It is sometimes transliterated as R x  or just Rx. This symbol originated in medieval manuscripts as an abbreviation of the Late Latin verb recipe, the imperative form of recipere, to take or take thus.rescription may also be used as a short form for prescription drugs to distinguish from over-the-counter drugs. In reference to the entire system of controlling drug distribution (as opposed to illicit drugs), prescription is often used as a metaphor for healthy directions from a prescribing medical practitioner.