noun
A shelf or case used for displaying items, typically in a store or exhibition.
新商品が陳列棚に並べられた。
The new products were arranged on the display shelf.
ショーケース is a loanword often used for glass display cases, while 陳列棚 is a more general term for any display shelf or rack.
Compound of 陳列 (chinretsu, 'display, exhibition') and 棚 (tana, 'shelf').