We found 27 dictionaries that define the word frustum:

General (21 matching dictionaries)

1. frustum: Merriam-Webster
2. frustum: Oxford Learner's Dictionaries
3. frustum: American Heritage Dictionary of the English Language
4. frustum: Collins English Dictionary
5. frustum: Vocabulary.com
6. frustum: Wordnik
7. frustum: Wiktionary
8. frustum: Webster's New World College Dictionary, 4th Ed.
9. frustum: The Wordsmyth English Dictionary-Thesaurus
10. frustum: Infoplease Dictionary
11. Frustum, frustum: Dictionary.com
12. Frustum: Wikipedia, the Free Encyclopedia
13. Frustum: Online Plain Text English Dictionary
14. frustum: Webster's Revised Unabridged, 1913 Edition
15. frustum: Rhymezone
16. Frustum: AllWords.com Multi-Lingual Dictionary
17. frustum: Webster's 1828 Dictionary
18. frustum: FreeDictionary.org
19. frustum: Mnemonic Dictionary
20. frustum: TheFreeDictionary.com
21. frustum: Wikimedia Commons US English Pronunciations

Computing (1 matching dictionary)

22. frustum: Encyclopedia

Medicine (1 matching dictionary)

23. online medical dictionary (No longer online)

Science (2 matching dictionaries)

24. Frustum: Eric Weisstein's World of Mathematics
25. frustum: PlanetMath Encyclopedia

Slang (1 matching dictionary)

26. frustum: Urban Dictionary

Tech (1 matching dictionary)

27. AUTOMOTIVE TERMS (No longer online)

(Note: See frusta as well.)

Definitions from Wiktionary (frustum) ▸ noun:  A cone or pyramid whose tip has been truncated by a plane parallel to its base. ▸ noun:  A portion of a sphere, or in general any solid, delimited by two parallel planes. Similar: bifrustum, truncated tetrahedron, truncated cube, quadricone, oblique pyramid, trihedron, pyramid, scutoid, pyramidoid, triangular prism, more... Opposite: solid, whole, complete, full Phrases: spherical frustum, Viewing frustum, more... Adjectives: conical, conic, inverted, middle, hollow, regular, inscribed, right, lower, pyramidal, short ▸ Words similar to frustum ▸ Usage examples for frustum ▸ Idioms related to frustum ▸ Wikipedia articles (New!) ▸ Popular adjectives describing frustum ▸ Words that often appear near frustum ▸ Rhymes of frustum ▸ Invented words related to frustum