Reasonable creature
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
A human being, including a lunatic, an idiot, an unborn child, or a slave. See Walk. (Miss.) 83.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Under the common-law rule that murder is taking the life of a "reasonable creature" under the king's peace, with malice aforethought, the phrase means a human being, and has no reference to his mental condition, as it includes a lunatic, an idiot, and even an unborn child. See State v. Jones, Walk. (Miss.) 85.
Defined under Reasonable in Black's Law Dictionary.