term:

Legitime

legitime n

[French, from Latin legitima (pars) the lawful (share)]
in the civil law of Louisiana
: the portion (as one-fourth) of a testate succession that is reserved for a forced heir called also forced portion compare disposable portion, falcidian portion, marital portion NOTE: The fraction used to calculate the legitime will vary depending on the number of forced heirs.

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.