also: かおりん
noun
kaolin; china clay; porcelain clay
Rare technical term for kaolin, a fine white clay used in porcelain and paper. In modern Japanese, カオリン is overwhelmingly more common.
See also: カオリン
高陵土は、陶磁器の原料として知られる。
Kaolin is known as a raw material for ceramics.
This paper uses the notation 高陵土, but nowadays it is more common to write カオリン.
カオリン is the standard modern term for kaolin; 高陵土 is a rare, older kanji spelling of the same word.
The kanji 高陵土 literally means 'high-mound earth', likely a direct translation or phonetic adaptation of 'kaolin' (from Chinese 高嶺土, referring to Gaoling, the place in China where the clay was originally found). The reading こうりょうど is the on'yomi of these characters.