a clot of coagulated blood that forms within a blood vessel or inside the heart and remains at the site of its formation, often impeding the flow of blood
Compare embolus
Word origin
C17: from New Latin, from Greek thrombos lump, of obscure origin
thrombus in American English
(ˈθrɑmbəs)
nounWord forms: pluralˈthromˌbi (ˈθrɑmˌbaɪ)
the fibrinous clot attached at the site of thrombosis
Word origin
ModL < Gr thrombos, a clot < IE *dhrómbhos < base *dherebh-, to coagulate