adj. Pertaining to a molecule where the reactive center is not blocked from chemical attack due to the surrounding uncreative substituents not preventing reactive agents accessing the reactive site.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. not slowed or blocked or interfered with
Word Usage
"The Swedes added to their lead when P.J. Axelsson of the Boston Bruins swept in unhindered from the side boards to snap the puck between Luongo's legs."