Significatio vocis -ulum | Babel Free

Definitiones

1. Used to form a noun of instrument or means from a verb.
   declension-2, morpheme, neuter
2. nominative/accusative/vocative neuter singular
   accusative, form-of, morpheme, neuter, nominative, singular, vocative
3. accusative masculine singular
   accusative, form-of, masculine, morpheme, singular

Exempla

“amicio⟳ + -ulum → amiculum”

“specio⟳ + -ulum → speculum”

“cingo⟳ + -ulum → cingulum”

Gradus CEFR