pitchstone
n. [地]松脂石
词形变化
pitchstones
复数
pitchstones
释义与例句
n.
-
1.
A natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma.
松脂岩
不可数 地质
词汇关系
上位词 1
词源
From pitch + stone.
来源:wiktionary