n.
Pronunciation: ' tsvi-t ə r- ˌ ī - ˌ än also ' zwi-
Function: noun
Etymology: German, from Zwitter hybrid (fr. Old High German zwitaran, from zwi- ) + Ion ion ― more at TWI-
Date: 1906
: a dipolar ion
– zwit · ter · ion · ic \ ˌ zwi-t ə r- ī - ' ä-nik, ˌ swi- \ adjective