Webster's English Dictionary

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physiology

phys.i.ol.o.gy \-je-\ n [L physiologia natural science, fr. Gk, fr. physi- 
   + -logia -]logy 1: a branch of biology dealing with the processes, 
   activities, and phenomen a incidental to and characteristic of life or of 
   living matter 2: the organic processes and phenomena of an organism or any 
   of its parts o r of a particular bodily process