Where does “diluvial” come from?

diluvial (Spanish) comes from Spanish diluvio, from Old Spanish diluvio, from Latin dīluvium, from Latin dīluō, from Latin dis-, from Latin calceus, from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

diluvial (Spanish): diluvial

Definitions

diluvial

Ancestry of “diluvial”, step by step

Step	Language	Word	Meaning
1	Spanish	diluvio	deluge, downpour
2	Old Spanish	diluvio	deluge
3	Latin	dīluvium	a flood
4	Latin	dīluō	to wash away
5	Latin	dis-	asunder, apart, in two; reversal, removal;...
6	Latin	calceus	shoe
7	Latin	calx	limestone; chalk; the finish line
8	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin dis- →Every word from Latin calx →