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We found 27 dictionaries with English definitions that include the word heptad:
Click on the first link on a line below to go directly to a page where "heptad" is defined.

General (24 matching dictionaries)

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

Computing (1 matching dictionary)

25. heptad: Encyclopedia [home, info]

Medicine (1 matching dictionary)

26. heptad: online medical dictionary [home, info]

Science (1 matching dictionary)

27. heptad: How Many? A Dictionary of Units of Measurement [home, info]

(Note: See heptads for more definitions.)

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