· (chemistry) the process of refinement or purification of a substance by distillation
Hypernym(s): refining, refinement, purification
· the conversion of alternating current to direct current
Hypernym(s): conversion, transition, changeover
· the act of offering an improvement to replace a mistake; setting right
Synonym(s): correction
Hypernym(s): improvement
· determination of the length of a curve; finding a straight line equal in length to a given curve
Hypernym(s): determination, finding