seisin

As a noun seisin is

(legal|common law|historical) a feudal term for an entitlement to a freehold estate with a right to immediate possession; still used in technical discussions of real property law today.

As nouns the difference between sepsin and seisin

is that sepsin is (biochemistry) a soluble poison (ptomaine) present in putrid blood it is also formed in the putrefaction of proteid matter in general while seisin is (legal|common law|historical) a feudal term for an entitlement to a freehold estate with a right to immediate possession; still used in technical discussions of real property law today.

As a verb seising

is present participle of seise.

As a noun seisin is

a feudal term for an entitlement to a freehold estate with a right to immediate possession; still used in technical discussions of real property law today.

As nouns the difference between seizin and seisin

is that seizin is alternative form of seisin while seisin is a feudal term for an entitlement to a freehold estate with a right to immediate possession; still used in technical discussions of real property law today.