What is the meaning of Uncus?

A hook or claw.

Hence, any body part which is long, thin, and curved.

Specifically, the hooked end of the parahippocampal gyrus of the temporal lobe; also called the uncinate gyrus or uncus gyri parahippocampalis.

hook, barb

a hook used to drag criminals by the neck

a surgical instrument

hooked, curved, barbed

crooked, bent

Source: wiktionary.org