a substance released at certain sympathetic nerve endings: thought to be identical with adrenaline
sympathin sym·pa·thin (sĭm’pə-thĭn)
A substance, such as norepinephrine, that diffuses into the circulation from the terminals of active sympathetic nerves and serves as a chemical mediator.
noun 1. something used for or regarded as representing something else; a material object representing something, often something immaterial; emblem, token, or sign. 2. a letter, figure, or other character or mark or a combination of letters or the like used to designate something: the algebraic symbol x; the chemical symbol Au. 3. (especially in […]
mathematics, tool A small symbolic mathematics package for MS-DOS which can learn new facts. Latest version: 2.1.1. (Home (http://symbmath.com/). (2001-03-26)
symblepharopterygium sym·bleph·a·ro·pte·ryg·i·um (sĭm-blěf’ə-rō-tə-rĭj’ē-əm) n. The union of eyelid to eyeball by a cicatricial band of membrane similar to a pterygium.
sympatho- or sympath- pref. Sympathetic nervous system: sympathoadrenal.