Definition of "adulterine"

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.

1624, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: Printed by John Lichfield and James Short, for Henry Cripps, partition II, section 4, member 1, subsection i

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 […]

1776, Adam Smith, An Inquiry Into the Nature and Causes of the Wealth of Nations