sū
是牛羊等乳鑽抨成之。或以草葉藥而成之。所謂從牛出乳，從乳出酪，從酪出生酥，從生酥出熟酥，從熟酥出醍醐，而醍醐最為上藥。大智度論曰：「牛乳驢乳，其乳雖同，牛乳抨則成酥，驢乳抨則成糞。」
Curd, butter; crisp. It is described as produced by churning milk or treating it with herbs. Milk produces 酪, then 生酥, then 熟酥, then 醍醐.
a flaky pastry
crispy; flaky
limp; soft