Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
făbācĕus (also făbācĭus), a, um, adj. [faba], of or consisting of beans, = fabalis (post-Aug.): messis, Pall. Nov. 1: puls, Macr. S. 1, 12 med.
As subst. (sc. puls): făbācĭa, ae, f., Plin. 18, 12, 30, § 118; Apic. 5, 6.