1. The number three.

2. Ternary.

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

• ternon,
• rernion,
• gernion,
• yernion,
• 6ernion,
• 5ernion,
• twrnion,
• tsrnion,
• tdrnion,
• trrnion,
• t4rnion,
• terniin,
• terinon,
• ternionn,
• turnion,
• tarnion,
• Ternian,
• Tyrnion,
• Terniun,
• Tornion

The adjective form of the word "ternion" is "ternary".

The plural of the "ternion" can be the "ternions".

The singular of the "ternion" can be the "ternion".