Sentence:  If R is an integral domain, that is, has no <WSD>zero divisors</WSD>, then R[x] also has no <WSD>zero divisors</WSD>. 
Meaning of the word marked with <WSD> tags:  A nonzero element "a" of a ring "R" for which there exists some nonzero element "x" ∈ "R" such that either "ax" = 0 or "xa" = 0.