Where does “graptolitic” come from?

graptolitic (English) comes from English graptolite, from Ancient Greek γραπτός, from Ancient Greek γράφω, from Proto-Hellenic grəpʰō, from Proto-Indo-European gerbʰ-, from Proto-Indo-European ger- — to turn, bend, twist, wind; to tie, bind...

graptolitic (English): Of or pertaining to graptolites; containing...

Definitions

Of or pertaining to graptolites; containing...

Ancestry of “graptolitic”, step by step

graptolitic traces back through two separate lines of ancestry.

via English graptolite

Step	Language	Word	Meaning
1	English	graptolite	Any of a group of extinct aquatic colonial...
2	Ancient Greek	γραπτός	painted; written
3	Ancient Greek	γράφω	to scratch, cut into; to draw, sketch, paint; to...
4	Proto-Hellenic	grəpʰō	to scratch, cut or carve into
5	Proto-Indo-European	gerbʰ-	to carve
6	Proto-Indo-European	ger-	to turn, bend, twist, wind; to tie, bind...

via English ic

Step	Language	Word	Meaning
1	English	ic	related or pertaining to; having the character of

Every word from Proto-Indo-European ger- →Every word from Proto-Indo-European gerbʰ- →Every word from Proto-Hellenic grəpʰō →