We found 29 dictionaries that define the word breastbone:

General (24 matching dictionaries)

1. breastbone: Merriam-Webster
2. breastbone: Oxford Learner's Dictionaries
3. breastbone: American Heritage Dictionary of the English Language
4. breastbone: Collins English Dictionary
5. breastbone: Vocabulary.com
6. breastbone: Wordnik
7. breastbone: Cambridge Advanced Learner's Dictionary
8. breastbone: Wiktionary
9. breastbone: Webster's New World College Dictionary, 4th Ed.
10. breastbone: The Wordsmyth English Dictionary-Thesaurus
11. breastbone: Infoplease Dictionary
12. breastbone: Dictionary.com
13. Breastbone: Wikipedia, the Free Encyclopedia
14. Breastbone: Online Plain Text English Dictionary
15. breastbone: Webster's Revised Unabridged, 1913 Edition
16. breastbone: Rhymezone
17. Breastbone: AllWords.com Multi-Lingual Dictionary
18. breastbone: Webster's 1828 Dictionary
19. breastbone: FreeDictionary.org
20. breastbone: Mnemonic Dictionary
21. breastbone: TheFreeDictionary.com
22. breastbone: Longman Dictionary of Contemporary English

Computing (1 matching dictionary)

23. breastbone: Encyclopedia

Medicine (3 matching dictionaries)

24. breastbone: Merriam-Webster Medical Dictionary
25. breastbone: Dictionary of Cancer Terms
26. breastbone: Medical dictionary

Science (1 matching dictionary)

27. Bird On! (No longer online)

(Note: See breastbones as well.)

Definitions from Wiktionary ( ) ▸ noun:  (anatomy) The central narrow bone in the front of the chest, connecting the collarbone and the top ribs. Similar: sternum, breast bone, collarbone, clavicle, breast, ridgebone, rib cage, cross-bone, armbone, chest, more... Opposite: spine, backbone, vertebrae Adjectives: keeled, flexible, flat, lower, large, crooked, prominent, hardened, own, long, left ▸ Words similar to breastbone ▸ Usage examples for breastbone ▸ Idioms related to breastbone ▸ Wikipedia articles (New!) ▸ Popular adjectives describing breastbone ▸ Words that often appear near breastbone ▸ Rhymes of breastbone ▸ Invented words related to breastbone