#aspiration

• Arthrocentesis — An invasive medical procedure consisting of puncturing a joint cavity using a sterile needle, performed for diagnostic purposes (to extract and analyze synovial fluid) or therapeutic purposes (to evacuate a fluid effusion or inject medications). It is a fundamental technique in rheumatology and orthopedics for the rapid evaluation of septic or microcrystalline arthritis.
• Suction — The act of aspirating, suctioning, or drawing in and its result; a structural process whereby a fluid (gas or liquid) or fine particles are drawn into an enclosed space by creating a pressure differential or a partial vacuum; (in phonetics) an intense air emission accompanying the articulation of a sound (aspirated consonant).
• Aspiration — A strong desire, inner tendency, or grand ideal toward which a person or a collective aims (aspiration, ideal); in a technical context, it represents the physical action of absorbing or suctioning a fluid or gas by creating low pressure; in medicine, it denotes the accidental entry of foreign bodies or liquids into the airways or the controlled extraction of fluids from the body.
• Aspiration — A literary, archaic, or formal variant of aspiration, designating a strong desire, structural tendency, or spiritual drive of an individual or collectivity toward an ideal, a higher achievement, or a noble goal; (rarely, in an old physical sense) the mechanical process of drawing in or suctioning an air or fluid current.