名詞 embolus:

1. an abnormal particle (e.g. an air bubble or part of a clot) circulating in the blood

em.bo.lus

n.（名詞）
【復(fù)數(shù)】 em.bo.li[-lo.]
A mass, such as an air bubble, a detached blood clot, or a foreign body, that travels through the bloodstream and lodges so as to obstruct or occlude a blood vessel.
栓子：如氣泡、脫落的血塊或異物等物體在血流中停留而導(dǎo)致阻塞或閉塞血管

來源：
Latin [piston of a pump]
拉丁語 [泵的活塞]
from Greek embolos [stopper, plug]
源自 希臘語 embolos [停止器，塞子]
from emballein [to insert] * see emblem
源自 emballein [插入] *參見 emblem