F / fractārĭa
noun hapax

fractārĭa

gen. fractāriae · gender feminine · decl. 1st
(sc. machina) [frango]
a machine for crushing flint-stones
a machine for crushing flint-stones: caedunt (silices) fractariis CL libras ferri habentibus, Plin. 33, 4, 21, § 71; v. Sillig. ad h. l.