582. Substantives in #-c#, #-e#, #-l#, #-n#, #-t#, in #-ar#, #-ur#,
#-us#, and #-ūs#, are neuter: as,
#lac#, _milk_; #mare#, _sea_; #animal#, _animal_; #carmen#, _song_;
#caput#, _head_; #calcar#, _spur_; #fulgur#, _lightning_; #corpus#,
_body_; #iūs#, _right_.
583. #sōl#, _sun_, #pecten#, _comb_, #liēn#, _spleen_, #rēnēs#,
_kidneys_, plural, and #furfur#, _bran_, are masculine. So usually
#sāl#, _salt_, but sometimes neuter in the singular. #fār#, _spelt_, is
neuter.
584. #pecus#, _beast_, is feminine; also #tellūs#, _earth_, and the
substantives in #-ūs# which have #-ūdis# (475) or #-ūtis# (477) in the
genitive: as, #palūs#, _marsh_; #iuventūs#, _youth_.
STEMS IN #-u-#.
_The Fourth Declension._
Genitive singular #-ūs#, genitive plural #-u-um#.