Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. ŏlētum, i, n. [olea], a place planted with olive-trees; an olive-yard (ante-class. for the class. olivetum), Cato, R. R. 3, 5.
2. ŏlētum, i, n. [oleo], filth, dirt, excrement (very rare): oletum, stercus humanum, Paul. ex Fest. p. 203 Müll.: veto quisquam faxit oletum, Pers. 1, 112.