Cavity - Kuudou

Japanese: 空洞 - くうどう

〘noun〙① A hole that has opened up in something and it is hollow. That hole. It is also used as an analogy for something that is only formal and has no substance. ※Shikawa Iriumi (before the 17th century) 17 "A chime is hollow inside and floats on water, which is why it is called a floating chime." ※Kafū's Life and Art (1956) by Nakamura Shinichiro 12 "The unfilled cavity at the core of the self is open and visible." ② A cave in a mountain or somewhere similar. A cave. ※Kuruma-yahon Yokyoku, Kuruma-so (around 1514) "The airy breeze is cool." ③ A space that appears in part of an organ when tissue that has collapsed due to inflammation or necrosis is expelled from the body or absorbed within the body. For example, the one that forms in the lungs due to pulmonary tuberculosis. ※Arabian El Afi (adapted) (1957)〈Inukai Ken〉5 “This is an old photo from the year I coughed up blood〈omitted〉It’s easy to miss with the naked eye, but there is a cavity.”

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

〘名〙① 物の中に穴が開いてうつろになっていること。その穴。また、形式ばかりで、内容のないことのたとえにもいう。※四河入海（１７Ｃ前）一七「磬は其内空洞にして、水にも浮ぶものなる程に浮磬と云歟ぞ」※荷風の生涯と芸術（1956）〈中村真一郎〉一二「自己の中核の満されざる空洞が〈略〉あらわに口をあけているのが」② 山などにある洞穴。洞窟。※車屋本謡曲・車僧（1514頃）「くうだう風涼し」③ 炎症や壊死によってくずれた組織が、体外に排出または体内で吸収されたために臓器の一部に生じた空間。肺結核で肺にできるものなど。※亜剌比亜人エルアフイ（改作）（1957）〈犬養健〉五「これが喀血した年の古い写真です〈略〉肉眼では見逃しやすいが空洞があります」

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