noun
chōgin; Edo-period silver coin
A historical silver coin from the Edo period, shaped like a sea cucumber (海鼠). Used as currency before the Meiji Restoration.
丁銀は江戸時代に流通した銀貨の一種です。
Chōgin is a type of silver coin that circulated during the Edo period.
博物館で丁銀の実物を見た。
I saw an actual chōgin at the museum.
The name 丁銀 likely derives from its shape resembling a 丁 (a block or ingot) and 銀 meaning silver. The variant 挺銀 uses 挺, a counter for long objects, referring to the elongated shape.