early 15c., "surgical stitching of a wound, etc.," from Latin sutura "a seam, a sewing together," from sutus, past participle of suere "to sew" (from PIE root *syu- "to bind, sew"). Meaning "a seam, a line of joining or closure" is from 1570s.
1777, from suture (n.). Related: Sutured; suturing.
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