From Wiktionary, the free dictionary
Borrowed from Andalusian Arabic, from Arabic عَقْرَب (ʕaqrab, “scorpion”).
alacran m (plural alacranes)
- scorpion
c. 1250, Alfonso X, Lapidario, f. 105v:[…] preſtal contra contra toda ferida de culuebra o de alacran. o de otra beſtia emponzonada.- […] it serves against any injury made by a snake or a scorpion, or of any other venomous beast.