Definitions for "Secondary Winding"
coil such that current is induced in it by passing a current through the primary coil
This is the output winding of a transformer and is usually isolated from primary winding. Many transformers have two secondary windings.
The coil of wire on a transformer that receives its voltage and current by mutual inductance.
Keywords:  core, wire, output, turns, connect
Turns of wire on the core, used to connect the output to the core.