Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol. It occurs in yeast and bacteria, and also in oxygen-starved muscle cells, as in the case of lactic acid fermentation.
pupil noun [C] (EYE PART). âº the âcircular âblack âarea in the âcentre of an âeye, through which âlight âenters: Pupils âcontract in âbright âlight, and âdilate in darkness. (Definition of pupil from the Cambridge Advanced Learners Dictionary & Thesaurus Â© Cambridge University Press).
Pupillary light reflex - Terminology. 1  Pupil is the dark circular opening in the center of the iris and is where light enters the eye. 2  Left direct pupillary reflex is the left pupil's response to light entering the left eye. 3  Left consensual pupillary reflex is the left pupil's indirect response to light entering the right eye, the contralateral eye.