hila

The botanist examines the hila of several seeds under a magnifying glass.

Definition

1. Noun (plural of ):
   • Botany: In seed plants, "hila" are the scars or marks on seeds where they were attached to the ovary wall by the funicle (the stalk connecting the seed to the plant). This is the point through which nutrients were supplied to the developing seed.
   • Anatomy: In human or animal anatomy, "hila" (singular: hilum) refer to the points of entry or exit for structures such as blood vessels, nerves, and ducts into an organ (e.g., the hilum of the kidney, lung, or spleen).

Usage Examples

• Botany:

  • The hila of these beans are clearly visible as small, dark spots on the seed coat. (The attachment scars are easily seen on the surface.)
  • When examining a seed, the hila indicate where the seed was connected to the parent plant.

• Anatomy:

  • The hila of the lungs are where the bronchi, blood vessels, and nerves enter and exit. (These are the points of entry for essential structures.)
  • In a kidney transplant, the surgeon carefully handles the hila to avoid damaging the renal artery and vein.

Advanced Usage

• "Renal hila": The specific hila of the kidneys, where the renal arteries, veins, and ureters connect.

  • The renal hila are located on the medial side of each kidney. (The entry point is on the inner curve.)

• "Pulmonary hila": The hila of the lungs, visible on chest X-rays as a dense area near the center of the chest.

  • Enlarged pulmonary hila can indicate lymph node swelling or infection.

Variants and Related Words

• Hilum (singular noun): The singular form of "hila."

  • The hilum of the kidney is a vertical fissure on its medial border. (The single entry point.)

• Hilar (adjective): Relating to or located at a hilum.

  • Hilar structures include the blood vessels and nerves that pass through the hilum. (Describing the area around the hilum.)

Synonyms

• Scar (botany): A mark left after the detachment of a part, such as a seed scar.
• Fissure (anatomy): A narrow opening or groove, though not a direct synonym, it describes a similar structural feature.

Related Idioms

• No common idioms exist for "hila," as it is a specialized scientific term.

Phrasal Verbs

• No phrasal verbs apply to "hila," as it is a noun and not used as a verb.