Definition of plurale tantum in English:

plurale tantum

noun

Grammar
  • A noun which is used only in plural form, or which is used only in plural form in a particular sense or senses.

Origin

Late 19th century; earliest use found in American Journal of Philology. From classical Latin plūrāle the plural, use as noun of neuter of plūrālis + tantum only.

Pronunciation

plurale tantum

/plʊəˌreɪli ˈtant(ə)m/