ath·er·o·gen·e·sis 
(ăth′ər-ō-jĕnĭ-sĭs)
(ăth′ər-ō-jĕnĭ-sĭs)n.
Formation of atheromatous deposits, especially on the innermost layer of arterial walls.
[ATHERO(MA) + -GENESIS.]
ath′er·o·genic (-jĕnĭk) adj.
ath′er·o·gen·ici·ty (-jə-nĭsĭ-tē) n.