day degree


Definition of day degree

: one degree above or below a temperature adopted as a standard (as 42° F for the temperature at which vegetation commences) for a period of 24 hours or its equivalent (as 2° for 12 hours or 4° for 6 hours)

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First Known Use of day degree

1884, in the meaning defined above

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The first known use of day degree was in 1884

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Cite this Entry

“Day degree.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2020.

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