• Noun

    the raised part of a sundial that casts the shadow; a style.
    an early astronomical instrument consisting of a vertical shaft, column, or the like, for determining the altitude of the sun or the latitude of a position by measuring the length of its shadow cast at noon.
    Geometry . (formerly) the part of a parallelogram that remains after a similar parallelogram has been taken away from one of its corners.
    Lấy từ « http://tratu.soha.vn/dict/en_en/Gnomon »

    tác giả


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