We found 35 dictionaries that define the word birthmark:

General (25 matching dictionaries)

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

Computing (1 matching dictionary)

24. birthmark: Encyclopedia

Medicine (7 matching dictionaries)

25. birthmark: Merriam-Webster Medical Dictionary
26. Dorland's Illustrated Medical Dictionary (No longer online)
27. Birthmark: MedTerms.com Medical Dictionary
28. online medical dictionary (No longer online)
29. A-Z Family health glossary (No longer online)
30. birthmark: Medical dictionary
31. Birthmark: Drug Medical Dictionary

Miscellaneous (1 matching dictionary)

32. Brilliant Dream Dictionary (No longer online)

Slang (1 matching dictionary)

33. Birthmark: Urban Dictionary

(Note: See birthmarks as well.)

Definitions from Wiktionary ( ) ▸ noun:  A mark on the skin formed before birth. Similar: nevus, forebirth, premature birth, prem, birth, firstling, preterm, premature, head, primitive streak, more... Adjectives: red, large, small, shaped, purple, fatal, brown, little, dark, big, tiny Colors:     red,     brown,     pink,     purple,     blue, more... ▸ Words similar to birthmark ▸ Usage examples for birthmark ▸ Idioms related to birthmark ▸ Wikipedia articles (New!) ▸ Popular adjectives describing birthmark ▸ Words that often appear near birthmark ▸ Rhymes of birthmark ▸ Invented words related to birthmark