In being
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
Held to include a child in utero. See 55 Ohio St. 478, 45 N. E. 720.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
In existenco or life at a given moment of time, as, in the phrase "Ilfe or lives in being" in the rule against perpetuities. An unbarn child may, in some circumstances be considered as "in being." Phillips v. Herron, 55 Ohio St. 478, 45 N. E. 720; Hone v. Van Schaick, 3 Barb. Chi (N. Y.) 509.