atheroma
noun
ath·er·o·ma ˌa-thə-ˈrō-mə 
plural atheromas also atheromata ˌa-thə-ˈrō-mə-tə
1
: an abnormal fatty deposit in an artery
2
dated : fatty degeneration of the inner coat of the arteries
atheromatous
ˌa-thə-ˈrō-mə-təs
adjective 
Word History
Etymology
New Latin atheromat-, atheroma, from Latin, a tumor containing matter resembling gruel, from Greek athērōma, from athēra gruel
First Known Use
1842, in the meaning defined at sense 2
Medical Definition
atheroma
noun
ath·er·o·ma ˌath-ə-ˈrō-mə
plural atheromas also atheromata -mət-ə
1
: an abnormal fatty deposit in an artery
Patients with large (>5 mm) or mobile aortic atheromas have an increase in the rate of perioperative stroke by a factor of 5 to 10 and are likely to have a significantly increased long-term risk of stroke.
Mary E. Charlson and O. Wayne Isom, The New England Journal of Medicine
Mary E. Charlson and O. Wayne Isom, The New England Journal of Medicine2
dated : fatty degeneration of the inner coat of the arteries