Definition of "diurnally" [di•ur•nal•ly]

• Daily (adverb)
• By daylight. (adverb)
• Every daytime. (adverb)

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• "More specifically we looked at gene expression diurnally in leaves and tubers, during tuber induction and in tubers growing at different velocities."
• "Be suspicious of anything that varies seasonally or diurnally."
• "Temperatures can vary more diurnally than seasonally."