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  2. hour: hora: qhs, h.s., hs at bedtime or half strength quaque hora somni ii two tablets duos doses iii three tablets trēs doses n.p.o., npo, NPO nothing by mouth / not by oral administration: nil per os o.d., od, OD right eye. once a day (United Kingdom) oculus dexter omne in die o.s., os, OS left eye: oculus sinister o.u., ou, OU both eyes ...

  3. Military designation of days and hours - Wikipedia

    en.wikipedia.org/wiki/Military_designation_of...

    Times relative to the designation are indicated with +/−[Arabic numeral] after the letter, replacing -day or -hour with a count of the same unit: "D−1" (the day before D-Day), "L+9" (9 hours after L-Hour) etc. [citation needed] In less formal contexts, the symbol or numeral may be spelled out: "D minus 1" or "L plus nine." [citation needed ...

  4. Hour - Wikipedia

    en.wikipedia.org/wiki/Hour

    An hour (symbol: h; [1] also abbreviated hr) is a unit of time historically reckoned as 1 ⁄ 24 of a day and defined contemporarily as exactly 3,600 seconds . There are 60 minutes in an hour, and 24 hours in a day. The hour was initially established in the ancient Near East as a variable measure of 1 ⁄ 12 of the night or daytime.

  5. List of Latin abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_Latin_abbreviations

    translation usage and notes AB Artium Baccalaureus "Bachelor of Arts" An undergraduate bachelor's degree awarded for either a course or a program in the liberal arts or the sciences, or both. a.C.n. ante Christum natum "before Christ" "B.C." is commonly used in English instead to convey this meaning. ad. nat. delt. ad naturam delineavit "after ...

  6. Traditional Chinese timekeeping - Wikipedia

    en.wikipedia.org/wiki/Traditional_Chinese...

    kè has been defined as 1 ⁄ 96 of a day since 1628, so the modern kè equals 15 minutes and each double hour contains exactly 8 kè. [2] Since then, kè has been used as shorthand to talk about time in 1 ⁄ 8 of a double hour or 1 ⁄ 4 of a single hour. Their usage is similar to using "quarter hour" for 15 minutes or "half an hour" for 30 ...

  7. Date and time notation in the Netherlands - Wikipedia

    en.wikipedia.org/wiki/Date_and_time_notation_in...

    When the 24-hour clock is used in spoken language, which is not quite common, usually the written form is pronounced with the hours as a number, the word "uur" (hour) and the minutes as a number. For example, 17:21 might be pronounced as "zeventien uur eenentwintig" (seventeen hours twenty-one). Hours over 12 are not usually combined with ...

  8. Nychthemeron - Wikipedia

    en.wikipedia.org/wiki/Nychthemeron

    Nychthemeron / n ɪ k ˈ θ ɛ m ər ɒ n /, occasionally nycthemeron or nuchthemeron, is a period of 24 consecutive hours. It is sometimes used, especially in technical literature, to avoid the ambiguity inherent in the term day .

  9. 24-hour clock - Wikipedia

    en.wikipedia.org/wiki/24-hour_clock

    In most countries, computers by default show the time in 24-hour notation. For example, Microsoft Windows and macOS activate the 12-hour notation by default only if a computer is in a handful of specific language and region settings. The 24-hour system is commonly used in text-based interfaces.