Share this entry

unijunction Line breaks: uni|junc¦tion
Pronunciation: /ˈjuːnɪˌdʒʌŋ(k)ʃ(ə)n/

Definition of unijunction in English:


A negative resistance device consisting of a rectifying p-n junction in the middle of a length of semiconducting material that has an ohmic contact at each end, used as a switching element.
Example sentences
  • Shown on the left is an example of low cost planar unijunctions developed in the 1960s.
  • The unijunction transistor, or UJT, is a three-terminal device with a single pn-junction.
  • All in all, SCR's and unijunctions are probably the simplest and cheapest solutions, and appear to have no disadvantages.

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources