The kanji 脳 generally refers to the "brain." It represents the organ responsible for thought, perception, emotion, and control of bodily functions. It's the central processing unit of the body, where all the complex processes of life are coordinated.

・On-yomi (音読み): ノウ (nou) ・Kun-yomi (訓読み): None, as the primary meaning is directly represented by the on-yomi reading.

⚫︎脳みそ (noumiso) Translation: Brain; brains (colloquial) ⚫︎脳科学 (nou kagaku) Translation: Neuroscience ⚫︎脳卒中 (noushucchuu) Translation: Stroke; apoplexy

The kanji 脳 is a 形声文字 (keisei moji), a phono-semantic compound character. It is formed by: ⚫︎ The semantic component: 月 (tsuki/getsu), which is the radical representing the "moon," but here it's also a simplification of 肉 (niku), meaning "flesh" or "meat," indicating that the character is related to the body. ⚫︎ The phonetic component: 㞷 (nou), which provides the sound of the kanji. Originally, 脳 might have visually depicted the brain's internal structure or its relationship to the head, building upon the radical of flesh to associate this character with human body parts. Over time, the character evolved to more directly represent the organ itself.