Definition of quintus in US English:

quintus

noun

Early Music
  • A fifth vocal line in addition to the usual four in a vocal composition.

Origin

Late 19th century; earliest use found in George Grove (1820–1900), writer on music and lexicographer. From classical Latin quīntus (adjective) fifth, apparently after specifically use in post-classical Latin.

Pronunciation

quintus

/ˈkwɪntəs/