Where does “contrarotulum” come from?

contrarotulum (Latin) comes from Latin rotulus, from Latin rotula, from Arabic رَطْل, from Classical Syriac ܪܝܛܠܐ, from Classical Syriac ܠܝܛܪܐ, from French litre, from Medieval Latin litra, from Ancient Greek λίτρα — ingot.

contrarotulum (Latin): a counter-roll or register used to verify...

Definitions

a counter-roll or register used to verify...

Ancestry of “contrarotulum”, step by step

contrarotulum traces back through two separate lines of ancestry.

via Latin rotulus

Step	Language	Word	Meaning
1	Latin	rotulus	Alternative form of rotula; roll; roll of paper
2	Latin	rotula	a small wheel; roll
3	Arabic	رَطْل	—
4	Classical Syriac	ܪܝܛܠܐ	—
5	Classical Syriac	ܠܝܛܪܐ	libra, pound
6	French	litre	litre
7	Medieval Latin	litra	—
8	Ancient Greek	λίτρα	litra, a Sicilian silver coin; libra, a unit of...
9	Proto-Italic	*līðrā	ingot

via Latin contra

Step	Language	Word	Meaning
1	Latin	contra	against; opposite to; contrary to
2	Latin	rota	wheel; a car, a chariot; the disc of the sun
3	Proto-Indo-European	ret-	to run, to roll; to run, roll

Every word from Proto-Italic *līðrā →Every word from Ancient Greek λίτρα →Every word from Medieval Latin litra →