Part of speech: Noun
a blood clot formed within a blood vessel and remaining attached to its place of origin
Categories: Clot, Coagulum
The word "thrombus" comes from Ancient Greek θρόμβος, which was borrowed from New Latin thrombus.
thrombo- – A related word in the same word family.
Ancient Greek had multiple words for concepts English expresses with just one, showing different cultural priorities.