Tench

·noun A European fresh-water fish (Tinca tinca, or T. vulgaris) allied to the carp. It is noted for its tenacity of life.

tench
n. slang term, used during the days oftransportation, for the Hobart Town Penitentiary, or Prisoners...

Dictionary of Australasian Words Phrases and Usages by Edward E. Morris
tench
♦ Tinca vulgaris, a well-known fresh-water fish. ...

The Sailor's Word-Book