一切經音義 65.19

65.19

洋銅（以良反謂煑之消爛洋洋然也三蒼洋大水貌也字略作煬釋金也）。

洋銅 (molten copper: [the upper character is pronounced] 以 + 良 [yáng], meaning boiled until melted and dissolved, broad and flowing. The Sancang says: "洋 describes the appearance of vast waters." The Zilüe writes it as 煬, meaning to melt metal).