Sesquiquintum (Latin neuter) (masculine: sesquiquintus) refers to the improper rational fraction

It is a superparticular number.

The sesquiquintum in musical harmony is the ratio corresponding to the interval semiditonus.

See also: sesquialterum, sesquitertium, sesquiquartum.

External link

• Nova musica, liber tertius de proportionibus by Johannes Ciconia.
  • Sescuplum ad quincuplum sesquiquintum. Six is to five as a sesquiquintum.