A dropping of an organ or body part. Ptosis refers especially the "drooping" of the eyelid; a symptom characteristic of muscle nerve damage or a condition such as myasthenia gravis.
PTOSIS: "The Ptosis was quite pronounced on the patient's left eye."
Cite this page: N., Sam M.S., "PTOSIS," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/ptosis/ (accessed March 23, 2023).