What is the meaning of Benzo?

Of a ring compound, especially a heterocycle, which also has a fused benzene ring.

A divalent radical formed by the removal of two adjacent hydrogen atoms from a benzene ring.

Sometimes used in place of the phenyl group. (Can we add an example for this sense?)

Clipping of benzodiazepine.

first-person singular present indicative of benzer

Source: wiktionary.org