1. Belonging to the number eight.

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

• ictonary,
• kctonary,
• lctonary,
• pctonary,
• 0ctonary,
• 9ctonary,
• oxtonary,
• ovtonary,
• oftonary,
• odtonary,
• ocfonary,
• ocgonary,
• ocyonary,
• Octonairy,
• Ochonary,
• Ockonary,
• Aktonary,
• Octanary,
• Ocktnary,
• Ocktinary

• ochotona.

The adjective form of the word "octonary" is "octonarian".

The plural of the "octonary" can be the "octonaries".

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