1. A daybook; a journal.

2. Relating to a day or to the daytime; happening every day; performed in a day; performed in twenty-four hours; applied to diseases whose exacerbations are in the daytime.

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

• eturnal,
• diagnal,
• diereal,
• dinal,
• furnal,
• joiurnal,
• ournal,
• diginal,
• jeurnal,
• urnal,
• durpal,
• dignal,
• hournal,
• feurnal,
• biural,
• durnal,
• diurnl,
• dirunal,
• dyurnal,
• diurnel

• diagonal,
• journal,
• dual,
• dinar,
• final,
• dial,
• denial.

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

The plural of the "diurnal" can be the "diurnals".

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