What does "redwing" mean?

Redwing: A European thrush (Turdus iliacus). Its under wing coverts are orange red. Called also redwinged thrush. (b) A North American passerine bird (Agelarius phoeniceus) of the family Icteridæ. The male is black, with a conspicuous patch of bright red, bordered with orange, on each wing. Called also redwinged blackbird, red-winged troupial, marsh blackbird, and swamp blackbird.