mum


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μm

/μm/ micrometer (2).

μm

abbreviation for micrometer.

1 micrometer

(mī′krō-mēt-ĕr) [ micro- + -meter],

μm

One millionth of a meter (10−6); one thousandth of a millimeter (0.001 mm). It was formerly called a micron.

μm

micrometer.
References in classic literature ?
But I can turn a bit o' money for you, an' welcome, mum," said Bob, "if you'd like to risk it,--not as there's any risk to speak on.
Ay, mum," he said admiringly, "you know what's what--you do.
Eh, mum, not what you'd think it worth your while to look at.
No, mum, I know my place," said Bob, lifting up his pack and shouldering it.
Eh mum, I'm loth, that I am," said Bob, slowly depositing his pack on the step, and beginning to untie it with unwilling fingers.
Eh, mum, I told you how it 'ud be," said Bob, flinging aside the colored things with an air of desperation.
You'd do nothing with it, mum, you'd give it to the cook, I know you would, an' it 'ud be a pity,--she'd look too much like a lady in it; it's unbecoming for servants.
Didn't I tell you now, mum, as it 'ud hurt your feelings to look at my pack?
I was took in dreadful, for I'm a straightforrard chap,--up to no tricks, mum.
No, mum, it isn't worth your while; you can go to the shop to-morrow an' get the same pattern ready whitened.
But if I let you have it for ten shillin', mum, you'll be so good as not tell nobody.
Now then, mum, if you'll please to give me the net "