Word.ws English Dictionary

microdiorite

microdiorite noun: a course-grained igneous rock, of volcanic origin, containing mostly plagioclase feldspar; a rock whose composition is intermediate between andesite and diorite.

Noun

microdiorite (countable and uncountable, plural microdiorites)

  1. A course-grained igneous rock, of volcanic origin, containing mostly plagioclase feldspar; a rock whose composition is intermediate between andesite and diorite.
    • Early Miocene fossiliferous andesitic sediments are associated with some ophiolite massifs in northern Northland: Otaian volcanic grits (Hughes 1966) form a part of Maungaru Range (Fig. 3) and Waitakian–Otaian volcaniclastics are intruded by microdiorite near North Cape (Leitch 1966, 1970).1982 November 26, R. N. Brothers, M. Delaloye, “Obducted ophiolites of North Island, New Zealand: origin, age, emplacement and tectonic implications for Tertiary and Quaternary volcanicity”, in New...
    • It may be seen from this detailed description of localities that not only did the original character and distribution of the microdiorites vary throughout the district, but the subsequent alterations supply data from which inferences may be drawn as to the presence of concealed igneous bodies of...1907, Joseph Barrell, Geology of the Marysville Mining District, Montana

Forms of microdiorite

pluralmicrodiorites

Origin of microdiorite

From micro- + diorite.

Questions about microdiorite

What does microdiorite mean?
Microdiorite means a course-grained igneous rock, of volcanic origin, containing mostly plagioclase feldspar; a rock whose composition is intermediate between andesite and diorite.
What part of speech is microdiorite?
Microdiorite is a noun.
What is the plural of microdiorite?
The plural of microdiorite is microdiorites.

Words near microdiorite in the dictionary

  1. microdilution
  2. microdilutions
  3. microdimensional
  4. microdiode
  5. microdiodes
  6. microdiorite
  7. microdiorites
  8. microdipole
  9. microdipoles
  10. microdisc
  11. microdiscectomies

Source and license

Adapted from Wiktionary: microdiorite (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “microdiorite.” Word.ws, https://word.ws/microdiorite. Based on Wiktionary, CC BY-SA 4.0.