area opaca meaning

  "area opaca" in a sentence
n : the peripheral opaque area that surrounds the area pellucida of a vertebrate embryo (as of a bird) formed by discoidal cleavage
  • opaca:    [Medicine]—see ARE ...
  • area:    Noun: area &n ...
  • a gray area:    [American slang]Fi ...


  1. Koller s sickle is one of two regions ( the other being the caudal boundary region of the area opaca ) where expression patterns for genes important for gastrulation are localized.
  2. Koller's sickle, which is a local thickening of epiblast involved in the formation of the primitive streak through which gastrulation occurs, separates sheets of cells from the posterior end of the blastoderm from the underlying hypoderm and area opaca endoderm.

Related Words

  1. area of rescue assistance meaning
  2. area of responsibility meaning
  3. area of separation meaning
  4. area of steel meaning
  5. area of use meaning
  6. area operations meaning
  7. area oriented meaning
  8. area pellucida meaning
  9. area placentalis meaning
  10. area postrema meaning
PC Version