1 syenodiorite | Definition of syenodiorite

syenodiorite

noun
sy·​e·​no·​diorite | \ ¦sīəˌnō+\

Definition of syenodiorite

: a plutonic rock composed of acid plagioclase, less orthoclase, and a ferromagnesian mineral — compare granodiorite

History and Etymology for syenodiorite

syenite + -o- + diorite

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