How to Pronounce Diurnal Variation

Say it like this: dy-ER-nal vair-ee-AY-shun. The stress falls on the second syllable of the first word (ER), so you emphasize "dy-**ER**-nal." The second word flows with the stress on the third syllable: vair-ee-**AY**-shun.

Diurnal means something that happens during the day or follows a daily pattern. It comes from the Latin word "diurnus," which relates to daytime or a 24-hour cycle.

Variation means a change or difference that happens over time. In this phrase, it describes how something shifts or changes throughout the day.

Diurnal variation refers to a daily pattern of change—specifically, how something gets better or worse depending on what time of day it is. It's a way of describing something that doesn't stay the same throughout your day.

Diurnal has three syllables: di-UR-nal. Remember, the stress lands on the middle syllable, so don't accidentally say "DY-ur-nal" or "dy-ur-NAL."

Many people stress the first syllable and say "**DY**-ur-nal" instead of "dy-**ER**-nal." Another mistake is pronouncing it too quickly without separating the word parts clearly—take your time with each syllable.

You might say: "The doctor noted that the patient experienced diurnal variation in her mood patterns." This sentence tells you that the person's mood changed at different times of the day in a noticeable way.

You might hear "nocturnal" (meaning nighttime), which is the opposite of diurnal. Both words describe when something happens in a 24-hour cycle, just at different times.