groundmass /'^rajndmæs/ 📖 中文释义 n. [地]基质(一种连续分布的细粒物质,其中镶嵌着沉积物或沉积岩的大颗粒) 📘 English Definition(英文释义) n (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded ← groundman G 字母词表 groundmeter →