- nonagesimal
[nonagesimal 词源字典]
- " Astronomy and Astrology . The point of the ecliptic which is highest above the horizon at any given time, being 90 degrees round the ecliptic from the point at which it intersects the horizon", Early 18th cent.; earliest use found in John Harris (c1666–1719), writer and lecturer on science. From classical Latin nōnāgēsimus ninetieth (from nōnāgintā ninety (from novem nine + -gintā, suffix forming cardinal numerals from thirty to ninety, related to decem ten: see decem-) + -ēsimus, extended form (after vīcēsimus) of -simus, suffix used to form ordinal numerals) + -al.[nonagesimal etymology, nonagesimal origin, 英语词源]