Written on 28 May 2013. Posted in Origin of Phrases - N. Noon A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z Origin of Phrases - N Noon From the Latin word "nonus," which means nine, it originally referred to the ninth hour of the day counting from sunrise, which, on the year-average, is 6:00 am. This put nonus at 3:00 pm, or halfway between midday and sunset. Hits: 2200 Prev Next