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laitance

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noun lai·tance \ˈlā-t^ən(t)s\

Definition of laitance

: an accumulation of fine particles on the surface of fresh concrete due to an upward movement of water (as when excessive mixing water is used)

Origin and Etymology of laitance

French, from lait milk, from Latin lact-, lac — more at galaxy

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First Known Use: circa 1902

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