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Definition of Blue jay
1. Noun. Common jay of eastern North America; bright blue with grey breast.
Exact synonyms: Cyanocitta Cristata, Jaybird
Group relationships: Cyanocitta, Genus Cyanocitta
Generic synonyms: New World Jay
Group relationships: Cyanocitta, Genus Cyanocitta
Generic synonyms: New World Jay
Medical Definition of Blue jay
1.