Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
‡ malluvĭum, i, n. [manus-lavo], a wash-handbasin: malluvium dicitur, quo manus lavuntur malluviae quibus manus sunt lautae (i. e. water to wash the hands in), perinde ut quibus pedes pelluviae, Paul. ex Fest. p. 160 Müll.