A seam with a ridge with edges enclosed is called the Liberty Ridge Shell.
A self-enclosed seam is a seam that does not result in a raw edge but a finished, enclosed seam. See related links for more details.
An enclosed seam, or a French seam, is a seam that is sewn with the wrong sides of the fabric together. A second seam is usually sewn with the right sides together so that the first seam is enclosed.
rib, rim, seam
There are 11 types of seams which include: abutted, enclosed, exposed, false french, flat-felled, french, fused, glued, hairline, lapped seam with raw edges, and finally overedged seam.
A quilt.
It could be water leaking down through a crack or badly caulked seam.
The stitching on a cricket ball is called the equator or the seam.
To sew a concealed seam first sew the seam with the right side out wards, (the opposite way to how you would normally sew a seam). Next trim off the edges of the seam quite close to the stitch line. Lastly, turn the garment inside out and re-sew the seam close to the first stitching, you have now enclosed the first seam with its raw edges inside the second seam.
It is called "The Seam". just kidding
Jeans are constructed with several seaming techniques but the seam you are probably inquiring about is the "flat-fell" seam. Sewmetheway
Seam
A coal seam