thrombus

This term describes a stationary blood clot that develops and remains attached to the inner wall of a blood vessel or the heart. It is a precise medical term used to distinguish a localized blockage from an embolus, which is a clot or mass that has broken loose and traveled through the bloodstream to a different location. In clinical settings, the word carries a high-stakes connotation, as it implies a potential for ischemia or infarction. It is almost exclusively used in professional medical discourse, whereas a layperson would typically use the general term clot.