Definition

1. Noun:
   • (Embryology): A two-walled, cup-like depression that develops into the pigmented and sensory layers of the retina during the development of the eye.

Usage

• The term "optic cup" is used specifically in the fields of embryology and developmental biology to describe a critical, transient structure in eye formation.
• It is a compound noun. The primary definition refers to the embryonic structure.

Examples

• Noun:
  • The invagination of the optic vesicle forms the double-layered optic cup.
  • Proper development of the optic cup is essential for the formation of a functional retina.

Advanced Usage

• "Optic cup development": Refers to the biological process by which this structure forms and differentiates.
  • Researchers are studying the genetic signals that guide optic cup development.
• "Optic cup margin": Refers to the rim or edge of this embryonic structure.
  • The optic cup margin gives rise to the iris and ciliary body.

Variants and Related Words

• Optic vesicle (n): The earlier, balloon-like outgrowth from the embryonic brain that invaginates to form the optic cup.
• Retina (n): The light-sensitive layer of tissue at the back of the eye, which the optic cup develops into.
• Embryonic optic cup: A more precise term specifying the developmental stage.

Synonyms

• Embryonic eye cup: A descriptive synonym emphasizing its origin and shape.
• (None are perfect synonyms): In technical contexts, "optic cup" is the standard, precise term with no direct single-word synonym.

Related Phrases

• "Formation of the optic cup": A common phrase describing this key morphogenetic event in eye development.
  • The formation of the optic cup is a classic example of epithelial invagination.
• "Optic cup-derived tissues": Refers to the mature eye tissues that originate from this structure.
  • Photoreceptor cells are among the optic cup-derived tissues.

Notes

• "Optic cup" is a specialized anatomical term. It is not used in everyday language and has no idiomatic meanings or phrasal verbs.
• It is distinct from the "optic disc" or "physiological cup," which are terms for structures in the mature eye.

Noun

1. (embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina