Question

What do you mean by um in (measurement)​

Answer 1

Answer:

Um is meant for unit of measurment.

Answer 2

Answer:

What a nice Q.

I too had doubt in This but not now. Let me tell you answer..

The micrometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equalling 1×10−6 metre (SI standard prefix "micro-" = 10−6); that is, one millionth of a metre

Plzzz mark it best