What does fornācŭla mean in Latin?

fornācŭla, a noun, means “a little furnace”.

noun

fornācŭla

fornācŭla, ae, f. dim. id.,

I. a little furnace or oven.

I. Lit., Juv. 10, 82; Vitr. 7, 10, 1; Front. Ep. ad M. Caes. 1, 2 ed. Mai. —*

II. Trop., a kindler, exciter: hic totius calumniae fornacula, App. Mag. p. 321, 32.

What does fornācŭla mean in Latin?: fornācŭla, a noun, means “a little furnace”.