90
Degrees in perpendicular
Ninety, the number between 89 and 91.
As a standalone, 90 typically refers to a score, temperature, or speed: It hit 90 degrees today, She was doing 90 on the highway.
The nineties are the years 1990–1999, or ages 90–99: He lived into his nineties.
A 90-degree angle is a right angle.
Units of measurement
- perpendicularAt right angles
- geometryScience of spatial relationships
- angleGeometric measure of rotation
- rotationTurning on an axis
fraction · percentage · decimal · multiplication · division · addition · subtraction · arithmetic
Advanced in age
- seniorsOldest in a group
- octogenarianPerson in ninth decade
- nonagenarianPerson aged ninety-plus
- retirementLeaving the workforce permanently
longevity · lifespan · geriatrics · wisdom · experience · veteran · senescence · gerontology
Heat-measuring instrument
- heatwaveProlonged abnormally high temperatures
- scorchingExtremely hot, burning
- swelteringExtremely hot, uncomfortably so
- boilingLiquid vaporization temperature
hot · tropical · humidity · heatstroke · sunstroke · blistering · roasting · steamy
Annual date of origin
- anniversaryRecurring memorial date
- celebrationFestive event marking occasion
- achievementAccomplished goal or deed
- accomplishmentSuccessful completion of aim
landmark · jubilee · benchmark · watershed · breakthrough · pinnacle · apex · zenith
degrees
Units of measurement
- perpendicularAt right angles
- geometryScience of spatial relationships
- angleGeometric measure of rotation
rotation · fraction · percentage · decimal · multiplication · division · addition · subtraction · arithmetic · calculation
elderly
Advanced in age
- seniorsOldest in a group
- octogenarianPerson in ninth decade
- nonagenarianPerson aged ninety-plus
retirement · longevity · lifespan · geriatrics · wisdom · experience · veteran · senescence · gerontology · pensioners
thermometer
Heat-measuring instrument
- heatwaveProlonged abnormally high temperatures
- scorchingExtremely hot, burning
- swelteringExtremely hot, uncomfortably so
boiling · hot · tropical · humidity · heatstroke · sunstroke · blistering · roasting · steamy · sizzling
birthday
Annual date of origin
- anniversaryRecurring memorial date
- celebrationFestive event marking occasion
- achievementAccomplished goal or deed
accomplishment · landmark · jubilee · benchmark · watershed · breakthrough · pinnacle · apex · zenith · culmination
uniform
Identical throughout
score · stat · record · innings · match · round · set · game
- 90 degreesMeasure of perpendicularity
- 90 Day FianceReality show about international couples
- Interstate 90Longest U.S. freeway
- 90-day wonderRapidly commissioned military officer