We found 18 dictionaries that define the word root hair:

General (15 matching dictionaries)

1. root hair: Merriam-Webster
2. root hair: Oxford Learner's Dictionaries
3. root hair: American Heritage Dictionary of the English Language
4. root hair: Collins English Dictionary
5. root hair: Vocabulary.com
6. root hair: Wordnik
7. root hair: Wiktionary
8. root hair: The Wordsmyth English Dictionary-Thesaurus
9. root hair: Infoplease Dictionary
10. root hair: Dictionary.com
11. Root hair: Wikipedia, the Free Encyclopedia
12. root hair: Rhymezone
13. root hair: FreeDictionary.org
14. root hair: Mnemonic Dictionary
15. root hair: TheFreeDictionary.com

Computing (1 matching dictionary)

16. root hair: Encyclopedia

Medicine (1 matching dictionary)

17. root hair: Medical dictionary

Tech (1 matching dictionary)

18. Lake and Water Word Glossary (No longer online)

(Note: See root_hairs as well.)

Definitions from Wiktionary (root hair) ▸ noun:  (biology) The rhizoid of a vascular plant; a tubular outgrowth of a trichoblast, a hair-forming cell on the epidermis of a plant root. Similar: roothair, rootstalk, rootlet, rhizodermis, root system, rhizoid, radicle, root, rhizology, rhizome, more... ▸ Words similar to root hair ▸ Usage examples for root hair ▸ Idioms related to root hair ▸ Wikipedia articles (New!) ▸ Words that often appear near root hair ▸ Rhymes of root hair ▸ Invented words related to root hair