adulterine

adj

1. Spurious; due to adulteration.

   “a knave apothecary, that administers the physick, and makes the medicine, may do infinite harm, by his old obsolete doses, adulterine druggs, bad mixtures, quid pro quo, &c.”

2. Born of adultery.
3. Pertaining to adultery.
4. Illegal; unlicensed.

   “when any particular class of artificers or traders thought proper to act as a corporation without a charter , such adulterine guilds , as they were called , were not always disfranchised[…]”

noun

1. (rare)One born of an adulterous union.