暗黒時代: a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages

第三ビール: “third-category beer” not classified as beer in the Japanese tax code

大聖堂: cathedral

third eye

(cooking) filleting a fish into three

(chiefly Kansai) Synonym of きだい (kidai, “Dentex tumifrons”)

大学校: a college or an academy

(behavioural sciences) metatool

death certificate

"natural hair certificate": a certificate requested by some Japanese schools that affirm that a student's hair color is naturally not black, not straight, etc.