}Nouns of the 4th and 5th declensions



}1) Masculines: ductus, ūs, m.
}e.g. effectus – effectūs, situs – sitūs
}
}EXCEPTIONS: manus, ūs, f.; acus, ūs, f.
}
}2) Neuters: genū, ūs, n.
}e.g. cornū – cornūs
}
}

}Example ductus
}       sg.         pl.
}1. duct-us 1. duct-ūs
}2. duct-ūs 2. duct-uum
}4. duct-um 4. duct-ūs
}6. duct-ū 6. duct-ibus
}
}BUT: arcus – abl. pl. arcubus; artus – abl. pl. artubus
}
}
}Example genū
}      sg.        pl.
}1. gen-ū 1. gen-ua
}2. gen-ūs 2. gen-uum
}4. gen-ū 4. gen-ua
}6. gen-ū 6. gen-ibus
}
}

}Feminines: faciēs, ēī, f.
}
}rabiēs – rabiēī; rēs – reī
}EXCEPTION: diēs, ēī, m.
}
}speciēs (sg., pl.) – species: speciēs nova, speciēs novae
}speciēs (pl.) – tea: speciēs urologicae
}
}      sg.        pl.
}1. faci-ēs 1. faci-ēs
}2. faci-ēī 2. faci-ērum
}4. faci-em 4. faci-ēs
}6. faci-ē 6. faci-ēbus

}Sudden death
}Right knee
}New species
}Deep dental decay
}Premature delivery
}Aromatic tea
}Slow pulse
}Left hand
}