1A small northern constellation (the Foal or Little Horse), perhaps representing the brother of Pegasus. It has no bright stars.

1. 1.1as genitive Equulei /ēˈkwo͝olēˌī/ Used with preceding letter or numeral to designate a star in the constellation Equuleus.
   与其前面的字母或数字连用来命名该星座中的星
   the star Delta Equulei

   小马座δ星。