LEGITIM
Noun
legitim (plural legitims)
(legal) Common in Continental Law jurisdictions, a portion of property fixed by law, which a testator with issue is bound to bequeath to his children.
Usage notes
Where there is the law of legitim, and in the case where the testator has children, it is not lawful for a testator with issue to designate his spouse as sole heir while ignoring his children.
Source: Wiktionary
Le*git"im, n. Etym: [See Legitimate, a.] (Scots Law)
Definition: The portion of movable estate to which the children are
entitled upon the death of the father.
Source: Webster’s Unabridged Dictionary 1913 Edition