I've struck upon these uses of the noun 'bite' in texts related to surgery:
This distance is marked on the sclera with the caliper, and 7-0 or 8-0 double-armed polyglactin suture is used to place 2 radial bites on either side of the mark. These bites should be about 1.5 mm long and 1.5 mm from each other. (at Emedicine)
Most corneal surgeons prefer deep partial-thickness corneal suture bites over full-thickness bites. Incorporating 95% of the donor’s and host’s relative corneal thickness avoids posterior wound gape. Full-thickness bites may be associated with a higher chance of leakage along suture tracks and serve as a portal of entry for microorganisms or epithelial ingrowth. (at Ophthalmic News Network)
Long scleral suture bites are recommended to reduce the risk of the sutures cheese-wiring out of the sclera when the sutures are tied. (Strabismus surgery)
Does this use of bite make it equal to the word stitch (a single pass of a needle; the resulting loop of the thread)? Or are there nuances of meaning differentiating the two words?