|sīəˌnō+ noun
Etymology: syen ite + -o- + diorite
: a plutonic rock composed of acid plagioclase, less orthoclase, and a ferromagnesian mineral — compare granodiorite
|sīəˌnō+ noun
Etymology: syen ite + -o- + diorite
: a plutonic rock composed of acid plagioclase, less orthoclase, and a ferromagnesian mineral — compare granodiorite
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012