The eastern one.
·adj Of or relating to the time or act of rising; eastern; as, the ortive amplitude of a planet. ...
Webster's Dictionary of the English Language
·noun Of extent of means or resources. II. Amplitude ·noun Of extent of capacity or intellectual po...
As a general term, implies extent. In astronomy, it is an arc of the horizon intercepted between the...
The Sailor's Word-Book
An arc of the horizon, intercepted between the point of the sun's rising and the east point of the m...
The angle between the east or west point of a compass and any heavenly body at its rising or setting...