栗くり石いし

noun

construction stone (approx. 10-15 cm)

Technical term in civil engineering and construction for stones of a specific size range, roughly chestnut-sized.

• 基き礎そ工こう事じでは、栗くり石いしを敷しき詰つめてからコンクリートを流ながす。

  In foundation work, they spread chestnut-sized stones before pouring concrete.

noun

chestnut-sized pebble

Rare general term for a pebble about the size of a chestnut; the construction sense is far more common.

• 川原かわらでくり石いしくらいの大おおきさの石いしを拾ひろった。

  I picked up a stone about the size of a chestnut by the river.