gneissoid

== English == === Etymology === From gneiss +‎ -oid. === Adjective === gneissoid (comparative more gneissoid, superlative most gneissoid) (geology) Having a structure similar to that of gneiss, or intermediate between that of gneiss and mica or granite === Noun === gneissoid (plural gneissoids) (geology) A metamorphic rock having the composition of a laminated granite