noun, noun which may take the genitive case particle 'no'
total deafness; complete hearing loss
Medical or formal term for profound bilateral hearing loss. Often used in clinical, educational, or disability support contexts.
彼は生まれつき全聾だが、手話で豊かにコミュニケーションをとる。
He has been totally deaf since birth, but communicates richly through sign language.
全聾の児童のための特別支援教育が行われている。
Special support education is provided for children with total deafness.
難聴 means 'hearing loss' or 'hard of hearing' in general, ranging from mild to severe, while 全聾 specifically means total or profound deafness.
聾 alone can mean 'deafness' or 'deaf person', but 全聾 emphasizes the completeness of the hearing loss.
Compound of 全 (zen, 'all, complete') and 聾 (rō, 'deafness'). The reading ぜんろう follows standard on'yomi. The mixed spelling 全ろう is a modern adaptation to avoid the less common kanji 聾.