equation of time

noun

, Astronomy.

1. apparent time minus mean solar time, ranging from minus 14 minutes in February to over 16 minutes in November.

equation of time

noun

1. the difference between apparent solar time and mean solar time, being at a maximum in February (over 14 minutes) and November (over 16 minutes)

Word History and Origins

Origin of equation of time¹

First recorded in 1720–30