Nouns used of either sex, and hence
Varying the Gender with the sense,
Are Common: but of Neuter kind
Whatever cannot be declined.
The Gender of Nouns, if not determined by the above rules, may be known from their Declension and the Ending of the Nom. Sing, as follows:
§ 261. First Declension.
Feminine, except names of men, and Hăadria Adriatic Sea.
§ 262. Second Declension.
Masculine, -ŭs, -ĕr. Neuter, -um.
Exceptions:
Feminine are these in -us,
alvus, colus, carbdsus[1]
Arctus, humus, balanus[2]
With vannus[3] and the names of Trees.
Of Neuter Gender reckon these: vīrus, vulgus, pĕlăgus.[4]
§ 263. Third Declension. (1) Masculine endings:
Nouns Masculine are all in -ō,
Excepting those in -do and -go,
And Abstracts ending in -ĭō;
And Masculine are -ēn and -ĕn
(Excepting words that end in -mĕn),
With -ōs and -ŏr and -ĕr and -ĭs,
If Genitive is formed -ĕris;
Last, Masculine are -ĕs and -ēs,
If Genitive increase as, pēs.
Exceptions:
| -ō] | But cărō "flesh " is Feminine Though sanguis " blood " is Masculine.[5] |
| -ēn.] | To Neuter glūten we assign.[6][7] |
