NINETY
ninety, xc
(adjective) being ten more than eighty
ninety, XC
(noun) the cardinal number that is the product of ten and nine
Source: WordNet® 3.1
Etymology
Numeral
ninety
The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.
Synonyms
• Arabic numerals: 90
• Roman numerals: XC
Anagrams
• Tinney
Source: Wiktionary
Nine"ty, a. Etym: [See Nine, and cf. Forty.]
Definition: Nine times ten; eighty-nine and one more; as, ninety men.
Nine"ty, n.; pl. Nineties (.
1. The sum of nine times ten; the number greater by a unit than
eighty-nine; ninety units or objects.
2. A symbol representing ninety units, as 90 or xc.
Source: Webster’s Unabridged Dictionary 1913 Edition