Dictionary Definition
ninety adj : being ten more than eighty [syn:
90, xc] n : the cardinal number that is
the product of ten and nine [syn: 90, XC]
User Contributed Dictionary
English
Pronunciation
Cardinal number
ninety The cardinal number occurring after eightynine and before ninetyone, represented in Roman numerals as XC and in Arabic numerals as 90. Ordinal: ninetieth.
 Arabic numerals: 90
 Roman numerals: XC
 Chinese numerals: 玖拾, 九十
 Eastern Arabic numerals:
 Tibetan numerals: ༩༠
 Hindi numerals: ९०
 Gujarati numerals: ૯૦
 Gurmukhi numerals: ੯੦
 Bengali numerals: ৯০
 Oriya numerals: ୯୦
 Telugu numerals: ౯౦
 Kannada numerals: ೯೦
 Malayalam numerals: ൯൦
 Tamil numerals: ௯௰
 Khmer numerals: ៩០
 Thai numerals: ๙๐
 Lao numerals: ໙໐
 Myanmar numerals: ၉၀
 Amharic numerals: ፱፲
 Mongolian numerals: ᠙᠐
 Limbu numerals: ᥏᥆

 Last: eightynine, eighty
 Next: ninetyone, hundred
Translations
 American Sign Language: * Arabic:
 Aramaic:
 Bosnian: devedeset
 Breton: dek ha pevarugent
 Bulgarian: деветдесет (devetdeset)
 Chinese: 九十 (jiǔshí)
 Crimean Tatar: doqsan
 Croatian: devedeset
 Czech: devadesát
 Danish: halvfems
 Dutch: negentig
 Esperanto: naŭdek
 Finnish: yhdeksänkymmentä
 French:
 (France, Quebec) quatrevingtdix
 (Belgium, Luxembourg, Switzerland) nonante
 West Frisian: njoggentich
 German: neunzig
 Greek: ενενήντα (enenínda)
 Hebrew: תִּשְׁעִים (tiším) mf
 Hungarian: kilencven
 Interlingua: novanta
 Irish: nócha
 Italian: novanta
 Japanese: 九十 (kujū, kyūjū)
 Korean: 아흔 (aheun)
 Kurdish: not, nod, nehwed,
 Latin: nonaginta
 Maltese: disgħin
 Manx: kiare feed as jeig
 Norwegian: nitti
 Novial: ninanti
 Polish: dziewięćdziesiąt
 Portuguese: noventa
 Romanian: nouăzeci
 Russian: девяносто (devjanósto)
 Sanskrit: (navatí)
 Serbian: деведесет (devedeset)
 Sinhala: අනූව (anoova)
 Slovak: devätdesiat
 Spanish: noventa
 Swahili: tisini
 Swedish: nittio
 Tatar: туксан, tuksan
 Turkish: doksan
 Ukrainian: дев'яносто (devjanósto)
 Welsh: deg ar pedwar ugain vigesimal, traditional, naw deg decimal
Extensive Definition
In mathematics
90 is the sum of the squares of the integers 2 to 6. Because 90 is the sum of its unitary divisors (excluding itself), it is a unitary perfect number, and because it is equal to the sum of a subset of its divisors, it is a semiperfect number. 90 is a pronic number. But it is also a nontotient. It is a Perrin number, preceded in the sequence by 39, 51, 68.In normal space, the interior angles of a square
measure 90 degrees each. Also, in a right triangle, the angle
opposing the hypotenuse measures 90 degrees, with the other two
angles adding up to 90 for a total of 180 degrees.
Thus, an angle measuring 90 degrees is called a right angle.
90 is divisible by the sum of its base 10 digits,
thus it is a Harshad
number.
In astronomy
 Messier object M90, a magnitude 11.0 spiral galaxy in the constellation Virgo
 The New General Catalogue object NGC 90, a barred spiral galaxy in the constellation Andromeda
 The Saros number of the solar eclipse series which began on 134 BC September 28 and ended on 1345 March 4. The duration of Saros series 90 was 1478.4 years, and it contained 83 solar eclipses.
 The Saros number of the lunar eclipse series which began on 150 June 27 and ended on 1430 August 4. The duration of Saros series 90 was 1280.1 years, and it contained 72 lunar eclipses.
In other fields
Ninety is: The year AD 90, 90 BC, or 1990.
 The 1890’s were known as the Gay Nineties
 Abbott and Costello "The Naughty Nineties" film (1945)
 The atomic number of thorium, an actinide.
 The atomic weight of an isotope of strontium, a byproduct of nuclear reactions including fallout. It contaminates milk.
 The latitude of the North Pole and the South Pole.
 The designation of United States Interstate 90, a freeway that runs from Washington to Massachusetts.
 The code for international direct dial phone calls to Turkey.
 The ISBN Group Identifier for books published in the Netherlands.
 The Russian T90 tank is the most modern in their arsenal.
 The number of minutes in a football (soccer) match.
 In the song "My Grandfather's Clock" by Henry Clay Work, the number of years the clock stood on the floor.
 The number of Psalms credited to Moses; the ninetyfirst psalm is also likely his work.
 90 minute cassette tapes
 "90 Miles An Hour (Down A Dead End Street)" by Hank Snow
 Mission 90 Days film (2007)
 "Bob Hope: The First 90 Years" TV special aired on NBC on May 14, 1993)
 Joe 90, a 1968 U.K. TV series, set in 2012
 Playhouse 90, a 90minute long dramatic CBS TV series from 195661
 Cuba is 90 miles off the Florida coast
 Gloria Estefan "90 Millas" CD (90 miles)
 Nokia E90 Communicator
 90 Minutes in Heaven: A True Story of Death and Life by Don Piper
In sports
 Nike Total 90 Apparel is a brand name of apparel and sports equipment from equipment bags to goalkeeper gloves
 Major League baseball bases are 90 feet away in distance
 The car number most associated by former NASCAR team owner Junie Donlavey
 It also is the length (in minuites) of a soccer game.
References
ninety in Catalan: Noranta
ninety in Chuvash: 90 (хисеп)
ninety in Corsican: 90 (numeru)
ninety in Danish: 90 (tal)
ninety in Spanish: Noventa
ninety in Esperanto: Naŭdek
ninety in Basque: Laurogeita hamar
ninety in French: 90 (nombre)
ninety in Gan Chinese: 90
ninety in Korean: 90
ninety in Interlingua (International Auxiliary
Language Association): 90 (numero)
ninety in Italian: 90 (numero)
ninety in Hebrew: 90 (מספר)
ninety in Haitian: 90 (nonm)
ninety in Kurdish: Nod
ninety in Lithuanian: 90 (skaičius)
ninety in Lombard: Nümar 90
ninety in Hungarian: 90 (szám)
ninety in Malay (macrolanguage): 90
(nombor)
ninety in Dutch: 90 (getal)
ninety in Japanese: 90
ninety in Norwegian: 90 (tall)
ninety in Polish: 90 (liczba)
ninety in Portuguese: Noventa
ninety in Russian: 90 (число)
ninety in Sicilian: Nuvanta
ninety in Slovenian: 90 (število)
ninety in Swedish: 90 (tal)
ninety in Thai: 90
ninety in Vietnamese: 90 (số)
ninety in Wu Chinese: 90
ninety in Yiddish: 90 (נומער)
ninety in Contenese: 90
ninety in Chinese: 90