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.
Confidence votes 37. It doesn't always mean the same thing. It depends on the manufacturer. But I think EX means Executive, Extra, or Exceeds , LX usually means Luxury, and DX means Deluxe. I have a 2001 Mazda 626 LX-V6 and LX is top-of-the line trim for Mazda. But for Honda, EX is top-of-the line trim, then LX, then DX. Hope this help!