A distinction can be made between proximal ageing (age-based effects that come about because of factors in the recent past) and distal ageing (age-based differences that can be traced back to a cause early in person's life, such as childhood poliomyelitis).
physiologic. pertaining to physiology; normal; not pathologic. physiologic saline solution (physiologic salt solution) (physiologic sodium chloride solution) a 0.9 per cent solution of sodium chloride and water; it is isotonic, i.e., of the same osmotic pressure as blood serum. It is sometimes given intravenously to replace lost sodium and chloride.
1. (Physiology) physiol (of two or more muscles) having equal tension. 2. (of a drink) designed to replace the fluid and salts lost from the body during strenuous exercise. 3. (Chemistry) Also: isosmotic (of two solutions) having the same osmotic pressure, commonly having physiological osmotic pressure. 4. (Classical Music) music of, relating to, or characterized by the equal intervals of the well-tempered scale: isotonic tuning.