a neurotransmitter, derived from tryptophan, that is involved in sleep, depression, memory, and other neurological processes.
a compound that occurs in the brain, intestines, and blood platelets and acts as a neurotransmitter, as well as inducing vasoconstriction and contraction of smooth muscle; 5-hydroxytryptamine (5HT)
serotonin se·ro·to·nin (sěr’ə-tō’nĭn, sēr’-)
An organic compound formed from tryptophan and found in animal and human tissue, especially the brain, blood serum, and gastric mucous membranes, and active in vasoconstriction, stimulation of the smooth muscles, transmission of impulses between nerve cells, and regulation of cyclic body processes. Also called 5-hydroxytryptamine.
A monoamine substance that is formed from tryptophan and found in many animal tissues, including the intestine and central nervous system. In the brain, serotonin acts as a neurotransmitter that is involved in the control of pain perception, the sleep-wake cycle, and mood. Serotonin is also produced in some bacteria and plants.
noun 1. a group of organisms, microorganisms, or cells distinguished by their shared specific antigens as determined by serologic testing. 2. the set of antigens that characterizes the group. verb (used with object), serotyped, serotyping. 3. to classify by serotype. noun 1. (med) a category into which material, usually a bacterium, is placed based on […]
adjective 1. resembling serum; of a watery nature. 2. containing or secreting serum. 3. of, relating to, or characterized by serum. adjective 1. of, resembling, producing, or containing serum serous se·rous (sēr’əs) adj. Containing, secreting, or resembling serum.
- Serous cell
serous cell n. A cell, especially of the salivary gland, that secretes a watery albuminlike fluid.
- Serous cyst
serous cyst n. A cyst, such as a hygroma, containing clear serous fluid.