E·quu·le·us 
(ĭ-kwlē-əs)
(ĭ-kwlē-əs)n.
A constellation in the Northern Hemisphere, between Pegasus and Aquila.
[Modern Latin, from Latin eculeus, equuleus, small horse, foal, diminutive of equus, horse; see ekwo- in the Appendix of Indo-European roots.]