An SI prefix representing 10 -6 times the unit (one millionth). The symbol μ comes from the Greek word miklos (small). For example, 1 μm = 10 -6 m. The conventional name for micrometer, micron (μ), is being phased out. Duplicate prefixes such as millimicro (mμ) and micromicro (μμ) have been phased out in favor of nano (n) for millimicro and pico (p) for micromicro. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
単位の 10-6 倍 (100万分の1) を表わすSI接頭語。記号はμ。ギリシア語のミクロス (小さい) に由来する。たとえば 1μm=10-6m である。マイクロメートルの慣用呼称ミクロン (μ) は廃止の方向にある。また慣用の接頭語ミリマイクロ ( mμ ) ,マイクロマイクロ ( μμ ) のような重複接頭語は廃止され,ミリマイクロにはナノ (n) ,マイクロマイクロにはピコ (p) が使用されるようになった。
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