Where does “thecium” come from?

thecium (New Latin) comes from Ancient Greek θήκιον, from Ancient Greek θήκη, from Ancient Greek τίθημι, from Proto-Indo-European dʰeh₁- — to do, put, place.

Ancestry of “thecium”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	θήκιον	—
2	Ancient Greek	θήκη	box, chest; grave, tomb; sword sheath
3	Ancient Greek	τίθημι	I put, place, set; I make, cause to be; I make
4	Proto-Indo-European	dʰeh₁-	to do, put, place

Words derived from “thecium”

Every word from Proto-Indo-European dʰeh₁- →Every word from Ancient Greek τίθημι →Every word from Ancient Greek θήκη →