Definition of miller's thumb in English:

miller's thumb

Line breaks: mill¦er's thumb

noun

A small European freshwater fish of the sculpin family, having a broad flattened head and most active at night. Also called bullhead.
  • Cottus gobio, family Cottidae
More example sentences
  • They are also called miller's thumbs in some parts of the country.
  • Lampreys and miller's thumbs may not be caught but poisoning by liquid manure or destruction of their environment by modern land drainage schemes goes unpunished.
  • Also in the river are miller's thumbs and lamprey, a prehistoric fish, that buries into silt when young and behaves like a worm.

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