English
person-day
One person's working time for a day, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task.
Etymology graph
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- borrowed
- derived
- parts
- meaning component
- sound component
- related
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Origin
Compound of person + day, although, as with any such unit of measure (e.g., ton-miles, newton metres), the mathematical relationship of multiplication is simultaneously involved: X persons working during Y days = X × Y = Z person-days.
From Wiktionary, CC BY-SA 4.0.
Lineage
- partEnglishperson “An individual who has been granted personhood; usually a human being.”
- inheritedMiddle Englishpersoun
- derivedAnglo-Normanpersone
- derivedOld Frenchpersone “human being”
- inheritedMiddle Englishpersoun
- partEnglishday “The time when the Sun is above the horizon and it lights the sky.”
- inheritedMiddle Englishday “servant”
- inheritedOld Englishdæġ “day”
- inheritedMiddle Englishday “servant”