plurale tantum nouns or count nouns. The term for a noun that appears only in the singular form is singulare tantum (pl.: singularia tantum), such as...

For example, d(j)eca "children" is feminine singularia tantum and vrata "door" is neuter pluralia tantum. Pronouns may agree in gender with the noun or...

mass nouns) only have a singular form (singularia tantum); other nouns only have a plural form (pluralia tantum): Das All, der Durst, der Sand ("the Universe"...

soft o-stem nouns following first neuter declension, but some can be singularia tantum. Three verbs, bīti, imẹ́ti, and hotẹ́ti have special negative forms...