Definition

1. Noun:
   • The part of the small intestine between the duodenum and the ileum: The jejunum is the middle section of the small intestine, responsible for the majority of nutrient absorption from digested food.

Usage

• The word "jejunum" is a specific anatomical term used primarily in medical, biological, and health science contexts. It is a countable noun.

Examples

• Noun:
  • The surgeon examined the patient's jejunum for any signs of obstruction.
  • Most of the absorption of sugars and amino acids occurs in the jejunum.

Advanced Usage

• "Jejunal" (adjective): Pertaining to the jejunum.
  • The patient underwent a jejunal biopsy to confirm the diagnosis.

Variants and Related Words

• Jejunitis (noun): Inflammation of the jejunum.
• Jejunoileal (adjective): Relating to both the jejunum and the ileum.
  • The procedure involved a jejunoileal bypass.

Synonyms

• Mid-gut: A less specific, broader term sometimes used to refer to the middle section of the embryonic gut, which develops into parts of the small intestine including the jejunum. (Note: This is not a direct synonym but a related developmental term.)

Different Meanings

• The word "jejunum" has no other common meanings outside of its anatomical definition. It should not be confused with the adjective "jejune," which means dull or lacking significance.

Noun

1. the part of the small intestine between the duodenum and the ileum