equation of time
Date: 1667 the difference between apparent time and mean time usually expressed as a correction which is to be added to apparent time to give local mean time

New Collegiate Dictionary. 2001.

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  • Equation of time — Equation E*qua tion, n. [L. aequatio an equalizing: cf. F. [ e]quation equation. See {Equate}.] 1. A making equal; equal division; equality; equilibrium. [1913 Webster] Again the golden day resumed its right, And ruled in just equation with the… …   The Collaborative International Dictionary of English

  • Equation of time — Time Time, n.; pl. {Times}. [OE. time, AS. t[=i]ma, akin to t[=i]d time, and to Icel. t[=i]mi, Dan. time an hour, Sw. timme. [root]58. See {Tide}, n.] 1. Duration, considered independently of any system of measurement or any employment of terms… …   The Collaborative International Dictionary of English

  • equation of time — n. Astron. the constantly changing difference between the true sundial (apparent solar time) and mean solar time: the apparent solar time may be as much as 16 minutes ahead or behind: see ANALEMMA …   English World dictionary

  • Equation of time — The equation of time is the difference over the course of a year between time as read from a sundial and time as read from a clock, measured in an ideal situation (ie. in a location at the centre of a time zone, and which does not use daylight… …   Wikipedia

  • equation of time — The amount of time by which the mean sun leads or lags behind the true sun at any instant. Its value is positive or negative, depending on whether the true sun is ahead of or behind the mean sun. Its value never exceeds 16 1 /2 min. It is the… …   Aviation dictionary

  • equation of time — equa′tion of time′ n. astron. apparent time minus mean solar time, ranging from minus 14 minutes in February to over 16 minutes in November …   From formal English to slang

  • equation of time — the difference between mean solar time (as shown by clocks) and apparent time (indicated by sundials), which varies with the time of year. → equate to/with …   English new terms dictionary

  • equation of time — the difference between mean solar time and apparent time usually expressed as a correction which is to be added to apparent time to give local mean solar time and which never exceeds +16 minutes …   Useful english dictionary

  • equation of time — Astron. apparent time minus mean solar time, ranging from minus 14 minutes in February to over 16 minutes in November. [1720 30] * * * …   Universalium

  • Equation of a curve — Equation E*qua tion, n. [L. aequatio an equalizing: cf. F. [ e]quation equation. See {Equate}.] 1. A making equal; equal division; equality; equilibrium. [1913 Webster] Again the golden day resumed its right, And ruled in just equation with the… …   The Collaborative International Dictionary of English

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