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We found 32 dictionaries with English definitions that include the word pentad:
Click on the first link on a line below to go directly to a page where "pentad" is defined.

General (25 matching dictionaries)

1. pentad: Merriam-Webster.com [home, info]
2. pentad: Oxford Dictionaries [home, info]
3. pentad: American Heritage Dictionary of the English Language [home, info]
4. pentad: Collins English Dictionary [home, info]
5. pentad: Vocabulary.com [home, info]
6. pentad: Wordnik [home, info]
7. pentad: Wiktionary [home, info]
8. pentad: Webster's New World College Dictionary, 4th Ed. [home, info]
9. pentad: The Wordsmyth English Dictionary-Thesaurus [home, info]
10. pentad: Infoplease Dictionary [home, info]
11. Pentad, pentad: Dictionary.com [home, info]
12. Pentad (computing), Pentad (music), Pentad: Wikipedia, the Free Encyclopedia [home, info]
13. Pentad: Online Plain Text English Dictionary [home, info]
14. pentad: Webster's Revised Unabridged, 1913 Edition [home, info]
15. Pentad: Rhymezone [home, info]
16. Pentad: AllWords.com Multi-Lingual Dictionary [home, info]
17. pentad: Hutchinson's Dictionary of Difficult Words [home, info]
18. pentad: Free Dictionary [home, info]
19. pentad: Hutchinson Dictionaries [home, info]
20. pentad: The Phrontistery - A Dictionary of Obscure Words [home, info]
21. pentad: Luciferous Logolepsy [home, info]
22. pentad: Mnemonic Dictionary [home, info]
23. pentad: WordNet 1.7 Vocabulary Helper [home, info]
24. pentad: LookWAYup Translating Dictionary/Thesaurus [home, info]
25. pentad: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

26. pentad: Literary Criticism [home, info]

Computing (1 matching dictionary)

27. pentad: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

28. pentad: online medical dictionary [home, info]
29. pentad: Medical dictionary [home, info]

Science (2 matching dictionaries)

30. Pentad: Eric Weisstein's World of Mathematics [home, info]
31. pentad [1], pentad [2]: How Many? A Dictionary of Units of Measurement [home, info]

Tech (1 matching dictionary)

32. pentad: Glossary of Meteorology [home, info]

(Note: See pentads for more definitions.)

Quick definitions from WordNet (Pentad) ▸ noun:  the cardinal number that is the sum of four and one ▸ Also see pentads ▸ Words similar to pentad ▸ Usage examples for pentad ▸ Popular adjectives describing pentad ▸ Words that often appear near pentad ▸ Rhymes of pentad ▸ Invented words related to pentad