What is "adulterine"

Adulterine \A*dul"ter*ine\, n. An illegitimate child. [R.]

Adulterine \A*dul"ter*ine\, a. [L. adulterinus, fr. adulter.] Proceeding from adulterous intercourse. Hence: Spurious; without the support of law; illegal.

When any particular class of artificers or traders thought proper to act as a corporation without a charter, such were called adulterine guilds.
--Adam Smith.

a. 1 spurious; due to adulteration. 2 Born of adultery. 3 Pertaining to adultery. 4 illegal; unlicensed. n. (context rare English) One born of an adultery union.

adj. conceived in adultery