hen's tooth

名词 n.
中文释义

英文释义

名词 n.
  1. Anything not naturally occurring. idiomatic
    — as rare as a hen's tooth

词形变化

hen's teeth plural hens' teeth plural

词源

Example of a jocularly non-existent phenomenon, as many birds lack any teeth (having developed a bill instead). Compare horsefeathers and when pigs fly.
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