An Etymological Dictionary of Astronomy and Astrophysics

In a → semiconductor device, a region of transition between semiconducting regions of different electrical properties.

Etymology (EN): Junction “act of joining,” from L. junctionem, noun of action from jungere “to join,” cognate with Pers. yuq, juhé, as below; PIE base *yeug- “to join,”

Etymology (PE): Juheš, from juh, variant of yuq “yoke,”
Mid.Pers. jug, ayoxtan “to join, yoke;” Av. yaog- “to yoke, put to; to join, unite;” cf.
Skt. yugam “yoke;” Hittite yugan “yoke;” Gk. zygon “yoke,” zeugnyanai “to join, unite;” L. jungere “to join,” as above; O.C.S. igo, O.Welsh iou, Lith. jungas O.E. geoc.