autumn horse mackerel
Refers specifically to horse mackerel (aji) caught in autumn, when it is considered especially fatty and flavorful. A seasonal food term; the word itself is not common in everyday conversation but appears in culinary or fishing contexts.
Autumn horse mackerel is fatty and perfect for sashimi.
I found some fine autumn horse mackerel at the market.
Standard kanji spelling for this seasonal fish term.
Compound of 秋 (aki, 'autumn') and 鯵 (aji, 'horse mackerel'). The exact historical origin is uncertain, but it is a straightforward seasonal food name.