Secondary Explained

Secondary is an adjective meaning "second" or "second hand". It may refer to:

Secondary education
A secondary consumer in an ecological sense.
A Secondary dominant in music.
The Secondary in American football and Canadian football refers to the group of (usually at least four) defensive backs.
A Secondary functional group (or usually ion) attached to carbon atom connected to 2 other Carbon atoms in organic chemistry
Secondaries, the second-largest group of remiges (wing feathers), which attach to the inner lower arm.
secondary circuit, electrical circuit in a Transformer in which current is produced by electromagnetic induction, as opposed to a primary circuit.

See also