My teacher wrote that the average atomic mass unit is an inverted "u". Is this true?

Question

Isn't it just u instead of u inverted?

Answer 1

You don't trust your teacher?

Answer 2

There are conventions for unit names and variable assignments. Perhaps he meant the Greek lower case script "mu", which looks like a regular "u" with a long tail on the left.

Answer 3

thats micro something its _*10 to the negative sixth power