Sentence:  The set of integers, \mathbb{Z}, is the prototypical <WSD>ring</WSD>. 
Meaning of the word marked with <WSD> tags:  An algebraic structure which consists of a set with two binary operations: an additive operation and a multiplicative operation, such that the set is an abelian group under the additive operation, a monoid under the multiplicative operation, and such that the multiplicative operation is distributive with respect to the additive operation.