We found 18 dictionaries that define the word b horizon:

General (15 matching dictionaries)

1. B horizon: Merriam-Webster
2. B horizon: American Heritage Dictionary of the English Language
3. B horizon: Collins English Dictionary
4. B-horizon, B horizon: Vocabulary.com
5. b-horizon: Wordnik
6. B-horizon: Webster's New World College Dictionary, 4th Ed.
7. B horizon: The Wordsmyth English Dictionary-Thesaurus
8. B horizon: Infoplease Dictionary
9. B horizon, b-horizon: Dictionary.com
10. B horizon: Wikipedia, the Free Encyclopedia
11. B-horizon, B horizon: Rhymezone
12. b-horizon, b horizon: FreeDictionary.org
13. b-horizon, b horizon: Mnemonic Dictionary
14. B-horizon, B horizon: TheFreeDictionary.com
15. B horizon: Merriam-Webster

Computing (1 matching dictionary)

16. B-horizon, B horizon: Encyclopedia

Science (1 matching dictionary)

17. Botanical Terms (No longer online)

Tech (1 matching dictionary)

18. B horizon: Canadian Soil Information System

(Note: See b_horizons as well.)

Definitions from WordNet (B horizon) ▸ noun:  immediately below the A-horizon; contains deposits of organic matter leached from surface soils ▸ Words similar to b horizon ▸ Usage examples for b horizon ▸ Idioms related to b horizon ▸ Wikipedia articles (New!) ▸ Words that often appear near b horizon ▸ Rhymes of b horizon ▸ Invented words related to b horizon