intermediate wholesaler; middleman
A trader who buys from primary wholesalers and sells to retailers, common in Japanese distribution systems such as fish and produce markets.
There are many intermediate wholesalers at Tsukiji Market.
They sell directly to retailers without going through a middleman.
Compound of 仲 (なか, 'middle, relationship') and 卸 (おろし, 'wholesale'). The exact historical derivation is uncertain, but the term reflects the intermediary role in distribution.