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)
Indulge Your Inner Word Nerd
Origin and Etymology of laitance
French, from lait milk, from Latin lact-, lac — more at galaxy
First Known Use: circa 1902
Seen and Heard
What made you want to look up laitance? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!