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1. The decade from 1890 to 1899
   - 1890s
    
2. The decade from 1990 to 1999
   - 1990s
    
3. The time of life between 90 and 100
   - mid-nineties

1. The cardinal number that is the product of ten and nine
   - 90, XC

Type of: decade, decennary, decennium, large integer, time of life

Part of: age, eld, geezerhood, old age, years

Encyclopedia: Nineties