canary

A small, usually yellow, finch (genus Serinus), a songbird native to the Canary Islands.

Any of various small birds of different countries, most of which are largely yellow in colour.

A light, slightly greenish, yellow colour.

A light, sweet, white wine from the Canary Islands.

A lively dance, possibly of Spanish origin (also called canaries).

Any test subject, especially an inadvertent or unwilling one. (From the mining practice of using canaries to detect dangerous gases.)

A value placed in memory such that it will be the first data corrupted by a buffer overflow, allowing the program to identify and recover from it.

A female singer, soprano, a coloratura singer.

An informer or snitch; a squealer.

A (usually yellow) capsule of the short-acting barbiturate pentobarbital/pentobarbitone (Nembutal).

A yellow sticker of unroadworthiness.

To dance nimbly (as in the canary dance)

To inform or snitch, to betray secrets, especially about illegal activities.

Of a light yellow colour.