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.
Symbol, Not Letters, to a Appeal to a God. It's interesting to note that some interpret the Rx as not simply an R with a lowerase x. It's actually a full symbol, according to the StraightDope.com. The R loops down and curls below the line with the x slashing through the end.