What is "retractors"

Usage examples of "retractors".

Braids squeezed the utensil, causing the retractors to widen and the tines to plunge through.

Metal retractors had been set, spreading the edges of the wound apart.

She had removed the retractors, cleaned and dressed the wound as best she could.

Loveday snapped the retractors together viciously as Staff came back, tore off her gown and mask and cap, pinned on the small starched and frilled headdress the sisters of the Royal City were privileged to wear, and with a modicum of words as she handed over the keys, went off duty.