Millionth of a Meter
This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1451, Puzzle 1 (Printing Press).
Question is: Millionth of a Meter
and the answer is: MICRON
Word Meaning:
MICRON — (physics, metrology) Synonym of micrometre (“one-millionth of a metre”).
Definitions from Wiktionary.