We found 22 dictionaries that define the word pitchstone:

General (19 matching dictionaries)

1. pitchstone: Merriam-Webster
2. pitchstone: Oxford Learner's Dictionaries
3. pitchstone: American Heritage Dictionary of the English Language
4. pitchstone: Collins English Dictionary
5. pitchstone: Vocabulary.com
6. Pitchstone, pitchstone: Wordnik
7. pitchstone: Wiktionary
8. pitchstone: Webster's New World College Dictionary, 4th Ed.
9. pitchstone: The Wordsmyth English Dictionary-Thesaurus
10. pitchstone: Infoplease Dictionary
11. Pitchstone, pitchstone: Dictionary.com
12. Pitchstone: Wikipedia, the Free Encyclopedia
13. Pitchstone: Online Plain Text English Dictionary
14. pitchstone: Webster's Revised Unabridged, 1913 Edition
15. pitchstone: Rhymezone
16. Pitchstone: AllWords.com Multi-Lingual Dictionary
17. pitchstone: FreeDictionary.org
18. pitchstone: Mnemonic Dictionary
19. pitchstone: TheFreeDictionary.com

Computing (1 matching dictionary)

20. pitchstone: Encyclopedia

Medicine (1 matching dictionary)

21. online medical dictionary (No longer online)

Science (1 matching dictionary)

22. Archaeology Wordsmith (No longer online)

(Note: See pitchstones as well.)

Definitions from Wiktionary (pitchstone) ▸ noun:  (geology) a natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma Similar: packstone, cornstone, potstone, pitch, clinkstone, peastone, soapstone, ragstone, spiculite, carstone, more... Types: obsidian, perlite, pumice, scoria, volcanic glass, more... Adjectives: black, imperfect, porphyritic, perlitic, columnar, green, perfect, archaeological, glassy, dark, true ▸ Words similar to pitchstone ▸ Usage examples for pitchstone ▸ Idioms related to pitchstone ▸ Wikipedia articles (New!) ▸ Popular adjectives describing pitchstone ▸ Words that often appear near pitchstone ▸ Rhymes of pitchstone ▸ Invented words related to pitchstone