† subsidate,v.Obs.rare—1. [irreg.f. L. subsīdĕre to subside.] intr. To sink in. 1653R. Sanders Physiogn. 173 The eyes, being humble, subsidate. So subsiˈdation, a depression. 1838Fraser's Mag. XVII. 24 The protuberances or subsidations of the cranium.