From the Menstrual Period to Ovulation (the details you may not know!) When your menstrual cycle begins, your estrogen levels are low. Your hypothalamus (which is in charge of maintaining your hormone levels) sends out a message to your pituitary gland which then sends out the follicle stimulating hormone (FSH).
Medical Definition of SEASICKNESS. : motion sickness experienced on the waterâcalled also mal de mer.
Full Definition of OPACITY. 1. a: obscurity of sense: unintelligibleness b: the quality or state of being mentally obtuse: dullness. 2. : the quality or state of a body that makes it impervious to the rays of light; broadly: the relative capacity of matter to obstruct the transmission of radiant energy.3. : an opaque spot in a normally transparent structure (as the lens of the eye). See opacity defined for English-language learners.ull Definition of OPACITY. 1. a: obscurity of sense: unintelligibleness b: the quality or state of being mentally obtuse: dullness. 2. : the quality or state of a body that makes it impervious to the rays of light; broadly: the relative capacity of matter to obstruct the transmission of radiant energy.