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.
RX is the telegraph and radio abbreviation for receive, receiver or reception. RX, Rx, â , or rx may also refer to: â , 1  medical prescriptions. 2  Rx, the symbol used to describe apparent retrograde motion of planets. 3  rx, an abbreviation for a chemical reaction. 4  RX, IATA code for Regent Airways, a Bangladeshi airline.