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gneissoid

[nahy-soid]

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adjective

resembling gneiss.

Origin of gneissoid

First recorded in 1840–50; gneiss + -oid

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for gneissoid

Historical Examples of gneissoid

At this distance, rapids commence, and the bed of the river exhibited greenstone and gneissoid boulders.
Personal Memoirs Of A Residence Of Thirty Years With The Indian Tribes On The American Frontiers
Henry Rowe Schoolcraft