physiology

Etymology

From French physiologie, from Latin physiologia, from Ancient Greek φυσιολογία (phusiología, “natural philosophy”), from φύσις (phúsis, “nature”) + λόγος (lógos, “word”). Equivalent to physio- + -logy.

noun

1. A branch of biology that deals with the functions and activities of life or of living matter (as organs, tissues, or cells) and of the physical and chemical phenomena involved.
2. (obsolete) The study and description of natural objects; natural science.