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We found 15 dictionaries with English definitions that include the word polycyclic:
Click on the first link on a line below to go directly to a page where "polycyclic" is defined.

General (11 matching dictionaries)

1. polycyclic: American Heritage Dictionary of the English Language [home, info]
2. polycyclic: Collins English Dictionary [home, info]
3. Polycyclic, polycyclic: Wordnik [home, info]
4. polycyclic: Wiktionary [home, info]
5. polycyclic: Webster's New World College Dictionary, 4th Ed. [home, info]
6. polycyclic: Infoplease Dictionary [home, info]
7. polycyclic: Dictionary.com [home, info]
8. Polycyclic: Wikipedia, the Free Encyclopedia [home, info]
9. polycyclic: Dictionary/thesaurus [home, info]
10. polycyclic: Merriam-Webster.com [home, info]
11. polycyclic: Oxford Dictionaries [home, info]

Computing (1 matching dictionary)

12. polycyclic: Encyclopedia [home, info]

Medicine (2 matching dictionaries)

13. Polycyclic: Sleep Terms [home, info]
14. polycyclic: Medical dictionary [home, info]

Science (1 matching dictionary)

15. polycyclic: PlanetMath Encyclopedia [home, info]

Quick definitions from Wiktionary (polycyclic) ▸ adjective:  Involving more than one cycle. ▸ adjective:  (chemistry) Having two or more rings of atoms in the molecule. ▸ noun:  A polycyclic compound. ▸ Words similar to polycyclic ▸ Usage examples for polycyclic ▸ Popular adjectives describing polycyclic ▸ Popular nouns described by polycyclic ▸ Words that often appear near polycyclic ▸ Rhymes of polycyclic ▸ Invented words related to polycyclic