sinus; cavity; antrum
Anatomical term for a hollow space or cavity in the body, such as the paranasal sinuses.
The paranasal sinuses are cavities around the nose.
neighborhood (North Korean administrative division)
Used specifically for an administrative neighborhood unit in North Korea, roughly equivalent to a dong in South Korea.
There are many neighborhoods (dong) in Pyongyang.
Inflammation was observed in the maxillary sinus on the CT image.
North Korea's administrative divisions are divided into provinces, cities, counties, neighborhoods, etc.
cavity; hollow; cavern · hollow; cavernous
discernment; insight
limestone cave; limestone cavern
wind tunnel
Standard kanji spelling for both anatomical and administrative senses.
From Middle Chinese 洞 (duwngH, 'cave, hole'). The anatomical sense is a modern extension of the 'hollow' meaning. The North Korean administrative sense is a semantic loan from Korean 동 (dong), which itself is derived from the same Chinese character.