None. Plethysmography is a noninvasive diagnostic manometric study used to measure changes in the size of blood vessels by determining volume changes in the blood vessels of the eye, extremities, and neck or to measure gas volume changes in the lungs.
1. countable noun [usually with poss] A guardian is someone who has been legally appointed to look after the affairs of another person, for example a child or someone who is mentally ill. 2. countable noun. The guardian of something is someone who defends and protects it.
Wiktionary (0.00 / 0 votes) Rate this definition: protector (Noun). Someone who protects or guards, by assignment or on his own initiative. protector (Noun). A device or mechanism which is designed to protect. protector (Noun). One who prevents interference. protector (Noun). A state or other subject under international law, exercising a protectorate over another subject in international law. I stand before you in the spirit of pure public service uE000164860uE001 not as a protector of the status quo, but as an agent of change.