means A surgical stitch (or the act of stitching) used to hold tissue or a wound together while it heals; also, in anatomy, the seam-like joint where bones meet, as in the skull.

from From Latin sutura, "a seam," from suere, "to sew" — the same thread of sense that runs through "sew" itself, a cousin via the ancient Indo-European root *syu-, "to bind, to stitch." The word arrived in English through medical and anatomical use, naming both the surgeon's stitch and the natural seams in the skull where the bones knit together like fabric.