Dictionary
flat'-felled seam'
Pronunciation: (flat'feld"), [key]a seam on the face of a garment, as on the outside of the legs of blue jeans, made by overlapping or interlocking one seam allowance with the other and top-stitching them together onto the garment with two parallel rows of stitches.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.