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.
In other words, the Rx symbol was a corruption of the ancient symbol for the Roman god Jupiter. If you're an astrology fan, you know this symbol which has a very similar crossed leg at the bottom right.