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| pertaining to the blood in the pulmonary vein, having been oxygenated during its passage through the lungs and being normally bright red |
| the change in a muscle by which it becomes thickened and shortened |
electrotonus e·lec·trot·o·nus (ĭ-lěk'trŏt'n-əs, ē'lěk-)
n.
Alteration in excitability and conductivity of a nerve or muscle during the passage of an electric current through it.