For a custom word search, make your selections below. For an alphabetical listing select Alphabetical Search. Search is NOT case-sensitive.
1. definition or term - term ONLY i.e. oar
will find the definition for oar.
|Advanced Keyword Search|
|Search result for definition: altitude|
|Altitude: Used in celestial navigation, it is the angle a celestial body makes with a point on the horizon vertically below this object. Historically, altitude was measured with an astrolabe, a cross staff, a backstaff or quadrant and finally a sextant or octant.|