腴
Meanings
1
fatty underbelly of a fish
archaic
Archaic term for the fatty belly portion of a fish, now largely replaced by 砂ずり or 砂摺り, which also refer to a bird's gizzard. The reading つちすり is also archaic.
See also: 砂ずり (すなずり)
Old documents record that the fatty underbelly of fish (sunazuri) was highly prized.