Noun
A similarity of crystalline form between substances of similar composition, as between the sulphates of barium (BaSO4) and strontium (SrSO4). It is sometimes extended to include similarity of form between substances of unlike composition, which is more properly called homoeomorphism.
Source: Webster's dictionaryfalse and eccentric assumption of male and female isomorphism. Kenneth Minogue
A bijective map between two totally ordered sets that respects the two orders is an isomorphism in this category. Source: Internet
Another way to express this is that any vector space is completely classified ( up to isomorphism) by its dimension, a single number. Source: Internet
A groupoid is a category in which every morphism is an isomorphism. Source: Internet
Also called an endomorphism of G. ; Automorphism : An endomorphism that is bijective, and hence an isomorphism. Source: Internet
An important unsolved problem in complexity theory is whether the graph isomorphism problem is in P, NP-complete, or NP-intermediate. Source: Internet