Iron-deficiency anemia occurs because of a lack of the mineral iron in the body. Bone marrow in the center of the bone needs iron to make hemoglobin, the part of the red blood cell that transports oxygen to the body's organs. Without adequate iron, the body cannot produce enough hemoglobin for red blood cells.
(Ä­n-fÃ»râ²mÄ­-tÄ) n. pl. inÂ·firÂ·miÂ·ties. 1. a. The condition of being infirm, often as associated with old age; weakness or frailty: the infirmity brought on by the disease. b. A bodily ailment or weakness: complained about his infirmities.
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.