lipoid /ˈlɪpɔɪd/adjective 1noun 1forms 1 adjective1 •Of pertaining to fat.She advertised the lipoid virtues of what he had heard called junkfood, presumably food for junkies, whom, living in Tangiers, he knew all about. — 1984 noun1 •A lipid or other substance resembling fat formslipoids