1. A water-snake; a constellation.

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

• hideus,
• hydroos,
• hudrous,
• hyderous,
• bydrus,
• nydrus,
• jydrus,
• uydrus,
• yydrus,
• htdrus,
• hgdrus,
• hhdrus,
• hudrus,
• h7drus,
• hydeus,
• hyderus,
• hdrus,
• hydruss,
• iydrus,
• hidrus

• hydric,
• hydrous,
• hydrastis.

The adjective form of the word "hydrus" is "hydrus".

The plural form of the word "hydrus" is "hydrus".

The singular form of the word "hydrus" is "hydra"