gabbro

noun
gab·​bro | \ ˈga-(ˌ)brō How to pronounce gabbro (audio) \
plural gabbros

Definition of gabbro

: a granular igneous rock composed essentially of calcic plagioclase, a ferromagnesian mineral, and accessory minerals

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Other Words from gabbro

gabbroic \ ga-​ˈbrō-​ik How to pronounce gabbro (audio) \ adjective

Examples of gabbro in a Sentence

Recent Examples on the Web Basalt and gabbro rocks, for example, have tiny defects in their crystals that could release electrical charges into the air. Christina Nunez, National Geographic, 16 Apr. 2019 Basalt and gabbro rocks, for example, have tiny defects in their crystals that could release electrical charges into the air. Christina Nunez, National Geographic, 16 Apr. 2019 The rise itself is a large plateau about the size of California that contains 2,500,000 cubic kilometers of most basalt and gabbro (the stuff of oceanic crust). Erik Klemetti, WIRED, 6 Sep. 2013

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'gabbro.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of gabbro

circa 1776, in the meaning defined above

History and Etymology for gabbro

borrowed from Italian (Tuscan), perhaps going back to Vulgar Latin *gabrum, altered from Latin glabr-, glaber "hairless, smooth" — more at glad entry 1

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Time Traveler for gabbro

Time Traveler

The first known use of gabbro was circa 1776

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Cite this Entry

“Gabbro.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/gabbro. Accessed 22 Jun. 2021.

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More from Merriam-Webster on gabbro

Britannica.com: Encyclopedia article about gabbro

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