单词 | serotonin |
释义 | Word Frequency serotonin(ˌsɛrəˈtəʊnɪn) noun 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) Word origin from sero- + ton(ic) + -in |
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