from The Century Dictionary.

  • Resembling gneiss in structure, especially with reference to the foliated arrangement of the constituents. Rocks are called gneissoid when they have the gneissic structure only imperfectly developed.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective geology Having a structure similar to that of gneiss, or intermediate between that of gneiss and mica or granite
  • noun geology A metamorphic rock having the composition of a laminated granite


from Wiktionary, Creative Commons Attribution/Share-Alike License

From gneiss +‎ -oid


Help support Wordnik (and make this page ad-free) by adopting the word gneissoid.



Log in or sign up to get involved in the conversation. It's quick and easy.