Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dĕcem-mŏdĭus, a, um, adj., containing ten modii (very rare): corbulae, Col. 12, 50, 8.
Subst.: dĕcemmŏdĭae, ārum, f. (al. decimodiae, sc. corbulae), baskets holding each ten modii, id. 12, 18, 2.