Nouns in Latin

Dictionary form and determining declension

There are exactly five declensions in Latin. To correctly use a word in medical practice, it is necessary to know its dictionary form. The dictionary entry of a Latin noun always consists of three mandatory components:

1. The nominative singular form (Nom. sg.).
2. The genitive singular ending (Gen. sg.).
3. The grammatical gender of the noun.

It is by the genitive singular ending (Gen. sg.) that a word's belonging to one of the five declensions is determined. This is a key rule of Latin grammar. In addition, in some cases the stem of a word in oblique cases differs from the nominative form. In such situations, the dictionary entry before the Gen. sg. ending obligatorily indicates the final part of the modified stem so that the term can be correctly declined.

Determining grammatical gender by endings

Determining the gender of a Latin noun often relies on its ending in the nominative case, although the dictionary form always plays the decisive role. The following basic patterns are distinguished:

• Nouns ending in -um and -on: These words always belong to the neuter gender. In the genitive case, they have endings characteristic of the 2nd declension.
• Nouns ending in -us: The vast majority of terms with this ending belong to the masculine gender. Depending on the word, in the genitive case they can take endings of the 2nd or 4th declension. However, there are also words ending in -us that belong to the neuter gender. They can only be identified by their dictionary form, and grammatically they will belong to the 3rd declension.
• Nouns ending in -en and -u: These words also require precise determination of gender and genitive ending using the dictionary, since their morphological features have certain peculiarities.

Unified INN grammar

All International Nonproprietary Names (INNs) of medicinal substances in Latin have a strictly unified form. This standardization includes a unified chemical formula, ATC classification, trademark, and, most importantly for Latin, a unified grammatical form.

According to the rules, any INN acts as a neuter noun belonging to the 2nd declension. In the nominative case, such names always have the standardized ending -um.

Registration of trade names of drugs in the Russian Federation

In the Russian Federation, a tradition has developed to approve the trade name of a new medicinal product simultaneously in the form of two interchangeable transcription equivalents: in Russian and in Latin. The presence of the Latin variant is critically important for international recognition of the drug in countries that use the Latin alphabet instead of Cyrillic.

The grammatical characteristics of the Latin equivalent completely coincide with the rules for INNs. These are neuter nouns of the 2nd declension. In the nominative singular (Nom. sg.) they end in -um, and in the genitive singular (Gen. sg.) they acquire the ending -i.

Let us look at examples of the transformation of Russian-language names into Latin:

• Bercarol turns into Bercarolum.
• Rifampicin is written as Rifampicinum.
• Isadrin is translated as Isadrinum.

When declining such names, only the ending changes. For example, the drug Asparcamum (Asparcam) in the phrase "tablets of Asparcam" will sound like tabulettae Asparcami. Similarly, Dibazolum (Dibazol) in the genitive case changes its form to tabulettae Dibazoli.

Pharmacopoeia as the basis for standardization

Understanding drug grammar is inextricably linked with pharmaceutical terminology. One of the basic concepts here is the pharmacopoeia. Etymologically, this term comes from the combination of two Ancient Greek words: pharmakon, which translates as "medicine", and poieo, which means "I make". In modern practice, a pharmacopoeia is an official collection of standards and regulations that strictly govern all quality requirements for manufactured medicines.

Class and exam questions

What else to study on this topic

• Genitive singular (Gen. sg.) endings for the 1st, 2nd, 3rd, 4th, and 5th declensions.
• Rules for determining gender and declension for nouns ending in -en and -u.
• Cases of noun stem changes in oblique cases.
• Unified chemical formula and ATC classification for medicinal products.

Other topics in the "Additional Topics" section

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.