Noun Dictionary Entries

For Latin nouns, there are 4 items presented in dictionary entries:

pēs,  pedis  m  foot: pēs is the nominative singular form. pedis is the genitive/possessive singular form.

m: gender of the word. f. feminine; n. neuter.

A noun is sorted into one of the five declensions based on its genitive case ending, so if we know the genitive, we know which declension it belongs to. Also from pedis, we know the stem is ped-, the part that doesn't change.

Genitive endings of all five declensions:
 Declension        Genitive Ending
1st                       -ae
2nd                       -ī
3rd                       -is
4th                       -ūs
5th                       -ēī