Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* fractārĭa, ae, f. (sc. machina) [frango], a machine for crushing flint-stones: caedunt (silices) fractariis CL libras ferri habentibus, Plin. 33, 4, 21, § 71; v. Sillig. ad h. l.