Matricide
Defined in 5 dictionaries — Ballentine's (1916), Bouvier (1914), Black's (1910), Anderson (1889), Abbott (1879)
Ballentine's Law Dictionary
James A. Ballentine · 1916
The murder of one’s mother; the murderer.
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
The murder of one’s mother.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
The murder of a mother; or one who has slain his mother.
A Dictionary of Law
William C. Anderson · 1889
See Homicide.
Dictionary of Terms and Phrases Used in American or English Jurisprudence
Benjamin Vaughan Abbott · 1879
The crime of killing one's mother.