What does "pyrolite" mean?

A theoretical rock considered to be the best approximation of the composition of Earth's upper mantle, generally considered to be one part tholeiitic basalt and three parts dunite.

Pyrolite

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
A theoretical rock considered to be the best approximation of the composition of Earth's upper mantle, generally considered to be one part tholeiitic basalt and three parts dunite. countable, uncountable

Etymology

From pyro- + -lite.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.