n. deviation; momentary mental lapse; Astronomy, apparent deviation from heavenly body's true position due to movement of observer with the earth. chromatic aberration, focusing of light of different colours at different points resulting in a blurred image. spherical aberration, focusing at different points of rays passing through different parts of spherical lens.
Blue symbolizes hope, the clear sky, and the streams of the south. Yellow stands for the sun and the Sahara Desert. Red represents unity, prosperity, and national sacrifice. Effective date: 6 November 1959.