Definition of impression for Students. 1  1 : something (as a design) made by pressing or stamping a surface The tires made impressions in the mud. 2  2 : the effect that something or someone has on a person's thoughts or feelings She shared her impressions of the city. 3  3 : an idea or belief that is usually uncertain.
A phlebotomist is someone who has been trained specifically in how to successfully draw blood, whether that be for a medical test or a blood donation. They work in such locations as doctors offices, medical labs, and hospitals. Most individuals who wish to pursue a career in phlebotomy will complete a training program before entering the workforce.
medical laboratory technician, a person who, under the supervision of a medical technologist or physician, performs microscopic and bacteriologic tests of human blood, tissue, and fluids for diagnostic and research purposes. Medical laboratory technicians are educated in a 2-year associate degree program. Also called clinical laboratory technician. A person trained to perform most lab tests in the US, but who lacks the education of a medical technologist and is not authorised to report or perform the most technically demanding lab tests.