Final answer:
The term for 'uniting a wound by stitches' is suture. It allows for the primary union of a wound, leading to faster and more thorough healing.
Step-by-step explanation:
The term that means "uniting a wound by stitches" is suture. This is a medical procedure that facilitates the primary union of a wound, which occurs when the wound edges are close enough to be brought together and fastened, usually with stitches, enabling quicker and more thorough healing. Without proper suturing, a wound may heal by secondary union, which takes longer and can result in a more prominent scar.