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We found 29 dictionaries with English definitions that include the word yolk sac:
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General dictionaries General (18 matching dictionaries)
  1. yolk sac: American Heritage Dictionary of the English Language [home, info]
  2. yolk sac: Collins English Dictionary [home, info]
  3. yolk sac: Vocabulary.com [home, info]
  4. yolk sac: Merriam-Webster's Online Dictionary, 11th Edition [home, info]
  5. yolk-sac: Wordnik [home, info]
  6. Yolk sac: InfoVisual Visual Dictionary [home, info]
  7. yolk sac: Compact Oxford English Dictionary [home, info]
  8. yolk sac: The Wordsmyth English Dictionary-Thesaurus [home, info]
  9. yolk sac: Infoplease Dictionary [home, info]
  10. yolk sac: Dictionary.com [home, info]
  11. yolk sac: UltraLingua English Dictionary [home, info]
  12. Yolk-sac, Yolk sac: Wikipedia, the Free Encyclopedia [home, info]
  13. yolk sac: Rhymezone [home, info]
  14. yolk sac: Free Dictionary [home, info]
  15. yolk sac: Mnemonic Dictionary [home, info]
  16. yolk sac: WordNet 1.7 Vocabulary Helper [home, info]
  17. yolk sac: LookWAYup Translating Dictionary/Thesaurus [home, info]
  18. yolk sac: Dictionary/thesaurus [home, info]

Computing dictionaries Computing (1 matching dictionary)
  1. Yolk-sac, yolk sac: Encyclopedia [home, info]

Medicine dictionaries Medicine (8 matching dictionaries)
  1. Sac, yolk, Yolk sac: MedTerms.com Medical Dictionary [home, info]
  2. Yolk Sac: Medical Dictionary [home, info]
  3. yolk sac: online medical dictionary [home, info]
  4. Yolk-sac: Anatomy of the Human Body [home, info]
  5. Yolk-sac: Gray's Anatomy (1918) [home, info]
  6. yolk sac: Neurotrauma Glossary [home, info]
  7. Yolk-sac, yolk sac: Medical dictionary [home, info]
  8. Sac, yolk, Yolk sac: Drug Medical Dictionary [home, info]

Science dictionaries Science (2 matching dictionaries)
  1. Yolk sac: Fishkeeping glossary [home, info]
  2. yolk sac: Anthropology dictionary [home, info]


Quick definitions from WordNet (yolk sac)

▸ noun:  membranous structure enclosing the yolk of eggs in birds reptiles marsupials and some fishes; circulates nutrients to the developing embryo
▸ noun:  membranous structure that functions as the circulatory system in mammal embryos until the heart becomes functional

Phrases that include yolk sac:   yolk sac placenta


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