dos rationabilis

noun
dos ra·ti·o·na·bi·lis | \-ˌrätēōˈnäbələ̇s, -ˌrashəˈnab-\

Definition of dos rationabilis 

English law

: a dos consisting of one third of the lands of which the husband is seised at the time of the espousals

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History and Etymology for dos rationabilis

Latin, reasonable dower

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