Wiktionary
nonopposable
a. Not opposable (of thumbs, toes, etc.).
Usage examples of "nonopposable".
Not being a specialist in biochemistry he had the advantage of nearly free-reined conjecture and used it to imagine a form of accelerated evolution (a process consisting, after all, of nothing more than life plus time) taking place in some lost fold of our genetic beginnings, long before the firemakers, the cave painters, the crafters of bone daggers, the brachiating primates, the bipeds who sucked nonopposable thumbs.