micrometer

詳細解釋：

micrometer

n.（名詞）
A device for measuring very small distances, objects, or angles, especially one based on the rotation of a finely threaded screw, as in relation to a microscope.
測微計，千分尺：用以測量非常小的距離，物體或角度的儀器，尤指顯微鏡上利用精細螺紋的螺桿的旋轉進行測量的儀器

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micrometer
micrometer 2

n.（名詞）
A unit of length equal to one thousandth (0-3) of a millimeter or one millionth (0 -')of a meter.
微米：等於千分之一(0-3)毫米的長度單位或一米的百萬分之一(0 -')