1. The bottom part of a lamp that fits into the socket
and conducts electricity to the filament
. Common stage
types include E-26/27 (medium screwbase
), G9.5 (TP-22/220, GLA family), and P28s (medium prefocus
). A socket is often incorrectly called a base.
2. The lower, supporting portion of anything.
3. Opposite of acidic, or alkali.