Caput lupinum
Defined in 4 dictionaries — Ballentine's (1916), Black's (1891), Burrill (1850), Bouvier (1839)
Ballentine's Law Dictionary
James A. Ballentine · 1916
A Dictionary of Law
Henry Campbell Black · 1891
In old English law. <A wolf's head. An outlawed felon
A New Law Dictionary and Glossary
Alexander M. Burrill · 1850
Lat. [Sax. wulfesheofod.] In Saxon and old English law. A wolf's head. An outlawed felon was anciently so called, because he might be slain or knocked in the head, like a wolf, by any one that should meet him. Bract. fol. 128 b, 134. Mirr. c. 4, sect. 4. Co. Litt. 128 b. 4 Bl. Com. 320. That is to say, he might be killed, if he resisted being taken, or endeavored to escape, but if he did neither, whoever killed him was bound to answer for him, as for any other person. This important explanation, given by Bracton, has been overlooked by some later writers. Bract. ub. sup. 2 Reeves' Hist. Eng. Law, 20.
A Law Dictionary, Adapted to the Constitution and Laws of the United States
John Bouvier · 1839
Eng. law, having the head of a wolf. An outlawed felon was said to have the head of a wolf, and might have been killed by any one legally. Now, such killing would be murder. 1 Hale, Pi. C. 497.