"rectification" in the noun sense
1. rectification
chemistry) the process of refinement or purification of a substance by distillation
2. rectification
the conversion of alternating current to direct current
3. correction, rectification
the act of offering an improvement to replace a mistake setting right
4. rectification
determination of the length of a curve finding a straight line equal in length to a given curve
Source: WordNet® (An amazing lexical database of English)
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