Where does “silicon” come from?

Silicon is derived from Latin silex, meaning flint or hard stone, with the suffix -on added to create a noun for the element.

silicon (English): A nonmetallic element with an atomic number of...

Definitions

Step	Language	Word	Meaning
1	English	silica	Silicon dioxide; Any of the silica group of the...
2	New Latin	silica	—
3	Latin	silex	pebble, stone, flint; rock, crag; lava

silicon — Etymology, Origin & Word History | Etymology Explorer