Definition

1. Noun:
   • A type of epithelial cell with a tall, column-like shape: A columnar cell is an epithelial cell characterized by its elongated, column-shaped form. These cells are taller than they are wide, and some possess cilia (hair-like projections) on their surface.

Usage Examples

• Noun:
  • The lining of the small intestine contains many columnar cells that aid in absorption.
  • Under the microscope, the ciliated columnar cells of the respiratory tract were clearly visible.

Advanced Usage

• "Simple columnar epithelium": A tissue layer composed of a single layer of columnar cells.
  • The stomach is lined with a simple columnar epithelium that secretes mucus.
• "Pseudostratified columnar epithelium": A tissue that appears layered but is actually a single layer of columnar cells of varying heights.
  • The trachea is lined with pseudostratified columnar epithelium, many cells of which are ciliated.

Variants and Related Words

• Columnar epithelium (n): A tissue type primarily made up of columnar cells.
  • Columnar epithelium is found in areas involved in secretion and absorption.
• Cuboidal cell (n): An epithelial cell that is roughly cube-shaped.
• Squamous cell (n): An epithelial cell that is flat and scale-like.

Synonyms

• Columnar epithelial cell: A more formal synonym.
• Ciliated columnar cell: Specifically refers to a columnar cell bearing cilia.

Related Phrases

• To be lined with columnar cells: Describes a surface or organ's cellular makeup.
  • The uterine tubes are lined with columnar cells.

Noun

1. an epithelial cell that is shaped like a column; some have cilia