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Definition of Gneissoid
1. a. Resembling gneiss; having some of the characteristics of gneiss; -- applied to rocks of an intermediate character between granite and gneiss, or mica slate and gneiss.
Definition of Gneissoid
1. Adjective. (geology) Having a structure similar to that of gneiss, or intermediate between that of gneiss and mica or granite ¹
2. Noun. (geology) A metamorphic rock having the composition of a laminated granite ¹
¹ Source: wiktionary.com
Definition of Gneissoid
1. [adj]