yolk sac Hear it!

yolk sac Definition

yolk sac

noun

  1. a saclike vascular membrane containing yolk, an outgrowth from the ventral surface of very yolky vertebrate embryos, as those of fishes, birds, or reptiles, that supplies nourishment to the embryo
  2. a homologous organ in most mammalian embryos that contains no yolk and that becomes a vestige at an early embryonic stage

yolk sac Usage Examples

Modifies a noun

  • tumor: Yolk sac tumor was characterized by a range of expression, which mirrored its morphologic variation.
  • infection: Often young birds acquire the infections from the hen or through navel or yolk sac infections.

Browse dictionary entries near yolk sac

  1. yolk
  2. Yolanda
  3. Yokosuka
  4. Yokohama
  5. yokel
  6. yokefellow
  7. yoke
  8. yok
  9. yoicks
  10. yohimbine
  1. yolk stalk
  2. Yom Kippur
  3. yon
  4. yond
  5. yonder
  6. yoni
  7. Yonkers
  8. yoo-hoo
  9. yore
  10. York