a conceptual structure or entity on which something draws or depends
the town's economic base collapsed
a place used as a centre of operations by the armed forces or others; a headquarters
he headed back to base
a substance capable of reacting with an acid to form a salt and water, or (more broadly) of accepting or neutralizing hydrogen ions
the middle part of a bipolar transistor, separating the emitter from the collector
the root or stem of a word or a derivative
a number used as the basis of a numeration scale
each of the four stations that must be reached in turn to score a run
denoting or befitting a person of low social class
(of coins or other articles) not made of precious metal
the basest coins in the purse were made in the 620s AD