For most children, the National Heart, Lung, and Blood Institute recommends one cholesterol screening test between the ages of 9 and 11, and another cholesterol screening test between the ages of 17 and 21.
Wiktionary (0.00 / 0 votes) Rate this definition: fixation (Noun). The act of fixing, or the state of being fixed or fixated. fixation (Noun). The act of uniting chemically with a solid substance or in a solid form; reduction to a non-volatile condition; -- said of gaseous elements. fixation (Noun). The act or process of ceasing to be fluid and becoming firm.
1. the act of fixing or fixating or the state of being fixed or fixated. 2. the process of rendering a photographic image permanent by removal of light-sensitive silver halides. 3. Psychoanal. a partial arrest of libidinal expression at an early stage of psychosexual development.