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American Dictionary of the English Language

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Diurnal


DIURNAL, adjective [Latin , daily.]

1. Relating to a day; pertaining to the daytime; as diurnal heat; diurnal hours.

2. Daily; happening every day; performed in a day; as a diurnal task.

3. Performed in 24 hours; as the diurnal revolution of the earth.

4. In medicine, an epithet of diseases whose exacerbations are in the day time; as a diurnal fever.

DIURNAL, noun A day-book; a journal. [See Journal, which is mostly used.]