1) Bird genus 2) Genus erithacus 3) Old world thrushes 
The robins are small passerine birds comprising the genus Erithacus. They were formerly classed as members of the thrush family, but now considered to be Old World flycatchers of the chat subfamily (Saxicolinae). The vernacular name `robin` is also applied to some other chats, as well as certain thrushes and some unrelated songbirds; see Robin#B.....
[n] - Old World thrushes
genus Erithacus noun Old World thrushes