1. A cloudy appearance; a white spot or slight opacity of the cornea; a faint and misty appearance, dimly visible in the heavens, and resolvable either under the telescope into groups of stars, or under the spectroscope into a mass of gaseous matter.

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

• necular,
• nubula,
• neblua,
• mebla,
• nebuli,
• kabula,
• nebulua,
• nubulae,
• nebulie,
• nobule,
• cebuela,
• fecula,
• niula,
• mabula,
• bebula,
• mebula,
• jebula,
• hebula,
• nwbula,
• nsbula

• newbill,
• nepal,
• nebel.

The adjective form of the word "nebula" is "nebular".