Scintilla jnris
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In real property law. A spark of right or interest. By this figurative expression was denoted the small particle of interest which, by a fiction of law, was supposed to remain in a feoffee to uses, sufficient to support contingent uses afterwards coming into existence, and thereby enable the statute of uses (27 Hen. VIII. c. 10) to execute them.
See 2 Washb. Real Prop. 125; 4 Kent, Comm. 238.