WordReference Random House Unabridged Dictionary of American English © 2026
pho•to•co•ag•u•la•tion
(fō′tō kō ag′yə lā′shən),USA pronunciation n.
pho•to•co•ag•u•la•tive
(fō′tō kō ag′yə lā′tiv, -lə tiv),USA pronunciation adj.
- Surgery, Ophthalmologya surgical technique using an intense beam of light from a laser or a xenon-arc bulb to seal blood vessels or coagulate tissue, used primarily in ophthalmology to repair detached retinas or to treat certain kinds of retinopathy.
- 1960–65; photo- + coagulation