decima

noun5

1. •
   A tithe or tax of one-tenth (now usually in historical Italian contexts).

   • He brandished his title as apostolic commissioner in court, and as supervisor of the papal decima in Tuscany. — 1988
2. •
   A 10-line verse or stanza, (chiefly) in the form of a song comprising an introductory verse followed by four such divisions.

   • His album... dealt with the song form of Puerto Rican back-country troubadours, and it had a preoccupation with... the décima, a 10-line stanza with specific rhyme schemes. — 2008
3. •
   An organ stop a tenth above the normal 8-foot pitch.
4. •
   (no longer used) A tenth.
5. •
   (no longer used) A tenth: a note nine degrees of the scale above or below a given note (and thus ten degrees separate counting inclusively) or the interval between such notes.