say it: rek-tuh-fuh-KAY-shuhn
rectification is a noun meaning "(chemistry) the process of refinement or purification of a substance by distillation". It carries 4 recorded senses.
(chemistry) the process of refinement or purification of a substance by distillation
chemistry
the conversion of alternating current to direct current
the act of offering an improvement to replace a mistake; setting right
determination of the length of a curve; finding a straight line equal in length to a given curve
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for rectification come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.