See Also: underfill(dictionary)

underfill (iou)



underfill noun & verb. E20.
[from UNDER- + FILL verb, after overfill.]
A. noun. Metallurgy. An insufficiency of metal to fill the aperture between rolls, the impression of a die, etc., so that the desired shape is not taken; a bar etc. that is too small for the rolling it is to undergo. E20.
b. verb trans. Fill incompletely or inadequately. M20.