Webster's Revised Unabridged Dictionary · 1913

Quintuple

Quintuple , adjective

[Latin quintus fifth: compare French quintuple, Latin quintuplex. Compare Quadruple.]

Multiplied by five; increased to five times the amount; fivefold.
Collocations (1)
Quintuple time (Music) , a time having five beats in a measure. It is seldom used.

Quintuple , transitive verb

[Compare French quintupler.]

To make fivefold, or five times as much or many.