1. Double.

2. Double. Duple ratio, that in which the autecedent is double the consequent, as 2 to 1, subduple being the reverse.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• suple,
• cupole,
• dupply,
• duble,
• pupple,
• eople,
• dykle,
• dounle,
• peuple,
• depley,
• puiple,
• doule,
• cuple,
• dopler,
• kuple,
• duples,
• tiple,
• durale,
• urple,
• tople

• dual,
• dueler,
• deeply,
• double,
• topple,
• dope,
• dale,
• purple,
• supple,
• Dubiel,
• dimple,
• duffle,
• duel,
• dull,
• Duval,
• Duvall,
• duffel,
• Duller,
• Duble,
• couple.

The adjective form of the word "duple" is "duplex".

The plural form of the word "duple" is "duples".

The singular form of the word "duple" is "duple".