Hard Metal Used in Ball-Point Pen Tips, Symbol Os
This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1441, Puzzle 4 (Sewing Machine).
Question is: Hard Metal Used in Ball-Point Pen Tips, Symbol Os
and the answer is: OSMIUM
Word Meaning:
OSMIUM — A chemical element (symbol Os) with atomic number 76: a hard, brittle, heavy, bluish-white transition metal found as a trace element in alloys, mostly in platinum ores.
Definitions from Wiktionary.