A species of life estate which a woman is, by law, entitled to claim on the death of her husband, in the lands and tenements of which he was seised in fee during the marriage, and which, her issue, if any, might by possibility have inherited. 3 Steph. Comm. 249; 2 Bl. Comm. 129; Cruise, Dig. tit 6; 2 Crabb, Real Prop, p. 124,