By Estimation
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In cenveyancing. A term used to indicate that the quantity of land as stated is estimated only, not exactly measured; has the same meaning and effect as the phrase "more or less."
Tarbell v. Bowman, 108 Mass. 341; Mendenhall v. Steckel, 47 Md. 453, 28 Am. Rep. 481; Hays v. Hays, 126 Ind. 92, 25 N. E. 600, 11 In lb A. 376.