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The Collaborative International Dictionary of English v.0.48 (gcide)

Nonagesimal \Non`a*ges"i*mal\, a. [L. nonagesimus the ninetieth.
See {Nonagenarian}.] (Astron.)
Of or pertaining to the ninetieth degree or to a nonagesimal.
[1913 Webster]


Nonagesimal \Non`a*ges"i*mal\, n. (Astron.)
The middle or highest point of the part of the ecliptic which
is at any given moment above the horizon. It is the ninetieth
degree of the ecliptic, reckoned from the points in which it
is intersected by the horizon.
[1913 Webster]

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