1. A dictionary of Greek or Latin prosody, usually called "Gradus ad Parnassum".

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

• gardus,
• fradus,
• vradus,
• bradus,
• hradus,
• yradus,
• tradus,
• geadus,
• gdadus,
• g5adus,
• g4adus,
• greadus,
• gradius,
• graddus,
• graduus,
• Gredus,
• gradas,
• Gradous,
• Graidus,
• Gradaus

The plural of the "Gradus" can be the "graduses".

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