focal accumulation of lipid material (atheroma) in the intima and subintimal portion of arteries, eventually resulting in fibrous thickening or calcification.
ath·er·om·a·tous de·gen·er·a·tion
(ath'ĕr-ō'mă-tŭs dĕ-jen'ĕr-ā'shŭn) Focal accumulation of lipid material (atheroma) in the intima and subintimal portion of arteries, eventually resulting in fibrous thickening or calcification.