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.
Re: What do the letters HHR stand for? I dont think it has any meaning what so ever. Just like no one can tell me what XE/XR stands for, LS/LT, though LT did stand for something on some cars back int he day, and LTZ. They are just formation of letters to signify trim levels. Like Honda's multi trim system, starting with VX, GX, HX, LX, EX, EX-L.