Mad point
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
The subject upon which a monomania is centered. See 1 Bland (Md.), 370, 17 Am. Dec. 311.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A term used to designate the idea or subject to which is confined the derangement of the mental faculties of one suffering from monomania. Owing's Case, 1 Bland (Md.) 388, 17 Am. Dee, 311. See Insanity.