blastoderm

American  

[blas-tuh-durm] / ˈblæs təˌdɜrm /

noun

Embryology.

1. the primitive layer of cells that results from the segmentation of the ovum.

2. the layer of cells forming the wall of the blastula, and in most vertebrates enclosing a cavity or a yolk mass.

---

blastoderm British  

/ ˈblæstəʊˌdɜːm /

noun

1. the layer of cells that surrounds the blastocoel of a blastula

2. a flat disc of cells formed after cleavage in a heavily yolked egg, such as a bird's egg

---

Other Word Forms

• blastodermatic
  adjective
• blastodermic
  adjective

---

Etymology

Origin of blastoderm

First recorded in 1855–60; blasto- + -derm

---

Example Sentences

See Examples For:

blastoderm

Such words as "blastoderm", "sindoc," "peris," "parasang," "sarcenet," "teazel," "nullah," "cantatrice," "barracan," "sistrum," writhed and hissed in her verses.

From Time Magazine Archive

But it must be borne in mind that all the nucleated masses of which the blastoderm consists are in continuity with each other and with the sparse protoplasmic reticulum of the subjacent yolk.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various

According to his account the cells of the blastoderm are formed actually in the ovum.

From Form and Function A Contribution to the History of Animal Morphology by E. S. (Edward Stuart) Russell

In this manner nucleated masses of protoplasm are continually being added to the periphery of the blastoderm and assisting in its growth.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" by Various

"Are you full awake now, ye red-hot blastoderm?" gasped Graham, struggling to free himself when Gallagher gave him leave.

From Empire Builders by Jay Hambidge

Random Word

Spin the wheel and learn a new word!

---