nonagesimal adjective & noun.
[nɒnǝ'dʒɛsɪm(ǝ)l] Now
rare or
obsolete.
E18.[from Latin nonagesima ninetieth, from nonaginta ninety: see -AL1.]Chiefly
Astronomy.
A. adjective. Ninetieth.
E18.nonagesimal degree,
nonagesimal point that point of the ecliptic which is highest above the horizon at any given time, being 90
above the point at which the ecliptic meets the horizon.
b. noun. The nonagesimal degree. L18. [TahlilGaran] English Dictionary ▲