Synonyms
Etymology

1. groundmass

noun. (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded.

Synonyms

  • porphyry
  • igneous rock

Etymology

  • ground (English)
  • grund (Old English (ca. 450-1100))
  • mass (English)
  • masse (Middle English (1100-1500))

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Example sentences of the word groundmass


1. Noun, singular or mass
Buff pumice is similar to its formation as light gray; it can occur when a transparent, colorless groundmass is present with few microcrysts.

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