1859 J. C. Peters 174 The natural non-saponifiable fat of the serum.
1944 J. B. Parry in R. Greenhalgh viii. 283/2 One is well advised to use oil-bound distemper or other non-saponifiable paint.
1997 32 303 A constituent of the nonsaponifiable lipids..is at least partially responsible for the cholesterol-lowering action.