| 释义 |
civil day
civil day n (Astronomy) another name for calendar day See day1 Thesaurus| Noun | 1. |  civil day - a day reckoned from midnight to midnightcalendar dayperiod, period of time, time period - an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period"day - a day assigned to a particular purpose or observance; "Mother's Day"date - the particular day, month, or year (usually according to the Gregorian calendar) that an event occurred; "he tried to memorizes all the dates for his history class"day of the week - any one of the seven days in a weekhebdomad, week - any period of seven consecutive days; "it rained for a week" |
civil day
civil day[′siv·əl ′dā] (astronomy) A mean solar day beginning at midnight instead of at noon; may be based on either apparent solar time or mean solar time. civil day A day of constant 24-h duration. It is the time interval between two successive lower transits of the mean sun for the meridian of that place. The civil day begins at midnight and the civil time is given by the hour angle of the mean sun plus 12 h. A civil day is divided into 24 equal parts—mean solar hours—which in turn are divided into minutes and seconds. Also called a solar day or a mean day.LegalSeedaycivil day
Synonyms for civil daynoun a day reckoned from midnight to midnightSynonymsRelated Words- period
- period of time
- time period
- day
- date
- day of the week
- hebdomad
- week
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