Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
exceptōrĭus, a, um, adj. [excipio], serviceable for receiving (post-Aug.): quali, Dig. 33, 7, 8; cf. subst.: exceptorium excipulum, conceptaculum, ἐκδοχεῖον, Gloss.
Subst.: exceptōrium, i, n., a receptacle, reservoir; plur., Vulg. Sir. 39, 22.