hilar
Học thuậtThân thiện
Definition
- Adjective:
- Relating to or located near a hilum: In anatomy and botany, "hilar" describes something that is of, relating to, or situated near a hilum. A hilum is a small notch, opening, or scar where structures like blood vessels, ducts, or nerves connect to an organ or seed.
Usage Examples
- Adjective:
- The surgeon carefully examined the hilar region of the lung. (The surgeon carefully examined the area near the lung's hilum.)
- A hilar scar is visible on the bean seed. (A scar near the seed's hilum is visible.)
- The biopsy focused on the hilar lymph nodes. (The biopsy focused on the lymph nodes located near the hilum.)
Advanced Usage
- "Hilar adenopathy": Enlargement of lymph nodes in the hilar region, often seen on chest X-rays.
- The radiologist noted bilateral hilar adenopathy on the scan.
- "Hilar vessels": The blood vessels entering or exiting an organ at its hilum.
- The hilar vessels of the kidney were carefully preserved during the operation.
Variants and Related Words
- Hilum (noun): The specific anatomical site (e.g., a depression or pit) where structures enter or leave an organ, such as in the lung, kidney, or spleen, or the scar on a seed marking the point of attachment.
- The renal artery and vein pass through the hilum of the kidney.
- Hilus (noun): An alternative singular form for "hilum."
Synonyms
- Hilar is a specific anatomical/botanical term with no perfect synonyms. Related descriptive phrases include:
- Pertaining to the hilum
- Located at the hilus
Notes on Meaning
- Primary Meaning: The word "hilar" is exclusively a scientific term used in medical (especially anatomical, radiological, pathological) and botanical contexts. It is not used in everyday conversation.
- Common Confusion: It should not be confused with the adjective "hilarious," which means extremely funny. "Hilar" and "hilarious" are etymologically distinct words.
Adjective
- of or relating to or located near a hilum