American English

Definition of residuum noun from the Oxford Advanced American Dictionary

 

residuum

 noun
noun
NAmE//rɪˈzɪdʒuəm//
 
(pl. residua
NAmE//rɪˈzɪdʒuə//
 
)
(technology)
 
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something that remains after a reaction or process has taken place
See the Oxford Advanced Learner's Dictionary entry: residuum