epiboly

The embryo undergoes epiboly during gastrulation.

Definition

1. Noun (Biology):
   • A process in embryonic development: "epiboly" refers to the movement and spreading of a sheet of cells (often the ectoderm) over the surface of an embryo, typically during gastrulation. This process involves the expansion and thinning of a cell layer to envelop the underlying yolk or other cell layers.

Usage Examples

• Noun:
  • During gastrulation in fish embryos, epiboly is a critical step that covers the yolk sac. (The spreading of cells over the yolk.)
  • The study of epiboly helps scientists understand how tissues form in early development. (The process of cell layer expansion in embryos.)

Advanced Usage

• "to undergo epiboly": to experience the process of cell spreading.

  • The blastoderm undergoes epiboly to enclose the entire yolk cell. (The outer cell layer spreads to cover the yolk.)

• "epiboly rate": the speed at which cell layers spread during development.

  • The epiboly rate is influenced by environmental factors like temperature. (The speed of cell movement.)

Variants and Related Words

• Epibolic (adj): relating to or characterized by epiboly.

  • Epibolic movements are essential for proper gastrulation. (Movements involving cell spreading.)

• Epiblast (n): the outer layer of cells in an embryo that gives rise to the ectoderm and undergoes epiboly.

  • The epiblast is the source of the cells that perform epiboly. (The layer that spreads.)

Synonyms

• Cell spreading: the general term for the movement of cells to cover a larger area.
• Overgrowth: the process of one cell layer growing over another (though less specific than "epiboly").

Related Idioms

• None commonly used. "Epiboly" is a specialized scientific term and does not appear in idiomatic expressions.