canary

中文： 金丝雀

1. A small, usually yellow, finch (genus Serinus), a songbird native to the Canary Islands. (countable, uncountable)
2. Any of various small birds of different countries, most of which are largely yellow in colour. (countable, uncountable)
3. A female singer, soprano, a coloratura singer. (countable, informal, uncountable)
4. An informer or snitch; a squealer. (countable, slang, uncountable)
5. A light, slightly greenish, yellow colour. (countable, uncountable)
6. A (usually yellow) capsule of the short-acting barbiturate pentobarbital/pentobarbitone (nembutal). (countable, slang, uncountable)
7. Any test subject, especially an inadvertent or unwilling one. (From the mining practice of using canaries to detect dangerous gases.) (countable, uncountable)
8. 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. (countable, uncountable)

复数 canaries