Dos rationabilis
A New Law Dictionary and Glossary · Alexander M. Burrill · 1850
A New Law Dictionary and Glossary
Lat.
In old English law
Reasonable dower
Rationabilis dos est eujuslibet mulieris de quoeungtie tenemento, tertiapars omnium terrarum et tenementorum, quas vir auus tenuit in daminico euo, et ita in feodo, quod earn inde dotare poterit die quo earn desponeavit. Reasonable dower is [the right] of every married woman, out of every kind of tenement, [being] the third part of all the lands and tenements which her husband held in his demesne and in fee, so that he might endow her thereof on the day he married her. Bract, fol.
92.
This passage is quoted by Lord Coke. Co. Litt. 33 b. This kind of dower was otherwise called dower by the common law.
2 BL Com. 134.