Definition of NPN in English:

NPN

Syllabification: NPN

adjective

Electronics
Denoting a semiconductor device in which a p-type region is sandwiched between two n-type regions.

Definition of NPN in:

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Word of the day vituperate
Pronunciation: vəˈt(y)o͞opəˌrāt
verb
blame or insult (someone) in strong language...