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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 period of permanent cessation of menstruation |
biorhythm bi·o·rhythm (bī'ō-rĭ&phonth;'əm)
n.
A biologically inherent cyclic variation or recurrence of an event or state, such as sleep cycles, circadian rhythms, and periodic diseases.
biorhythm (bī'ō-rĭ 'əm) Pronunciation Key
A recurring biological process, such as sleep, that is controlled by the circadian rhythms of an organism. See more at circadian rhythm. |