nonag

n. [ Pref. non- + age. ] Time of life before a person becomes of age; legal immaturity; minority. [ 1913 Webster ]

The human mind . . . was still in its nonage. Coleridge. [ 1913 Webster ]

a. Having the quality of nonage; being a minor; immature. W. Browne. [ 1913 Webster ]

n. [ L. nonagenarius containing, or consisting of, ninety, fr. nonageni ninety each; akin to novem nine. ] A person ninety years old. [ 1913 Webster ]

a. [ L. nonagesimus the ninetieth. See Nonagenarian. ] (Astron.) Of or pertaining to the ninetieth degree or to a nonagesimal. [ 1913 Webster ]

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 ]

n. [ L. nonus ninth + Gr. &unr_; angle. ] (Math.) A plane figure or polygon having nine sides and nine angles. [ 1913 Webster ]