Definition of anneal verb from the Oxford Advanced American Dictionary

 

anneal

 verb
verb
NAmE//əˈnil//
 
anneal something(technology)Verb Forms present simple I / you / we / they anneal
 
he / she / it anneals
 
past simple annealed
 
-ing form annealing
 
 
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to heat metal or glass and allow it to cool slowly, in order to make it stronger or softer
See the Oxford Advanced Learner's Dictionary entry: anneal