• Topic 6 "Nouns of the Fourth and Fifth Declension (Plural Number)" 

Topic 6 "Nouns of the Fourth and Fifth Declension (Plural Number)" 

Nouns of the fourth declension end in –us in the Nom. sing. and are mainly masculine. A few end in –u and are neuter.

Sing.	Plur.
m                     n	m                   n
Nom. procces-us         gen-u Gen. processu-us         gen-us	process-us           gen-ua    process-uum       gen-uum

A few nouns are feminine, eg. manus, us f – hand, acus, us f – acus and the names of the trees.

To make the nouns of the IV-th declention plural, study the example given below.

For masculine gender:

Nominativus Singularis - processus

Nominativus Pluralis - processus

Genetivus Singularis - processus

Genetivus Pluralis - processuum

For neuter gender:

Nominativus Singularis - cornu

Nominativus Pluralis - cornua

Genetivus Singularis - cornus

Genetivus Pluralis - cornuum

There are only a few nouns of the fifth declension. All end in –es in Nom. sing. Most are feminine, but dies, ei m – day and meridies, ei f – midday are masculine. The word species, ei f – species (mixture of herbs) is used only in pluralis.

	Sing.	Plur.
Nom.	di-es	di-es
Gen.	di-ei	di-erum

To make the nouns of the V-th declention plural, study the example given below.

Nominativus Singularis - facies

Nominativus Pluralis - facies

Genetivus Singularis - faciei

Genetivus Pluralis - facierum

Remember these anatomical terms.

1. facies, ei f – surface, face
2. superficies, ei f – surface
3. caries, ei f – caries
4. rabies, ei f – rabies
5. species, erum f (pl.) – species (muxture of herbs)
6. arcus, us m – arch
7. aditus, us m – access
8. cornu, us n - horn
9. ductus, us m – duct
10. genu, us n - knee
11. habitus, us m - habitus
12. meatus, us m – meatus
13. plexus, us m – plexus
14. processus, us m – process
15. pulsus, us m – pulse
16. sensus, us m - sense
17. sinus, us m – sinus
18. status, us m – state, condition
19. textus, us m - texture
20. tractus, us m – tract
21. visus, us m – vision