- mean solar second
- mean so·lar sec·ond -.sō-lər-'sek-ənd, -ənt n an mks unit of time equal to 1/86,400 of a mean solar day
Medical dictionary. 2011.
mean solar second
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mean solar second — noun : a cgs unit equal to 1/86,400 of a mean solar day … Useful english dictionary
Solar time — On a prograde planet like the Earth, the sidereal day is shorter than the solar day. At time 1, the Sun and a certain distant … Wikipedia
Second — This article is about the unit of time. For other uses, see Second (disambiguation). A light flashing approximately once per second. The second (SI unit symbol: s; informal abbreviation: sec) is a unit of measurement of time, and is the… … Wikipedia
solar time — ▪ chronology time measured by Earth s rotation relative to the Sun. Apparent solar time is that measured by direct observation of the Sun or by a sundial. Mean solar time, kept by most clocks (clock) and watches (watch), is the solar time… … Universalium
second — 1. (s or sec or ) a fundamental unit of time in all measuring systems and the SI base unit of time. The name simply means that this unit is the second division of the hour, the minute being the first (see minute [0]). The second was defined … Dictionary of units of measurement
Mean 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
second — second1 seconder, n. /sek euhnd/, adj. 1. next after the first; being the ordinal number for two. 2. being the latter of two equal parts. 3. next after the first in place, time, or value: the second house from the corner. 4. next after the first… … Universalium
second — I. adjective Etymology: Middle English, from Anglo French secund, from Latin secundus second, following, favorable, from sequi to follow more at sue Date: 13th century 1. a. next to the first in place or time < was second in line > b. (1) next to … New Collegiate Dictionary
Solar sail — Solar sails (also called light sails or photon sails, especially when they use light sources other than the Sun) are a proposed form of spacecraft propulsion using large membrane mirrors. Radiation pressure is about 10 5 Pa at Earth s distance… … Wikipedia
Second Coming of Christ — Second Coming redirects here. For other uses, see Second Coming (disambiguation). Part of a series on Eschatology … Wikipedia
