arculus
From LSJ
ὁκόσα γὰρ ὑπὰρ ἐκτρέπονται ὁποίου ὦν κακοῦ, τάδε ἐνύπνιον ὁρέουσι ὥρμησε → for whatever, when awake, they have an aversion to, as being an evil, rushes upon their visions in sleep (Aretaeus, Causes & Symptoms of Chronic Disease 1.5.6)
Latin > French (Gaffiot 2016)
(1) arcŭlus, ī, m. (dim. de arcus ), coussinet qu’on place sur la tête pour porter les vases sacrés : P. Fest. 16, 6 ; Gloss.