1) Buddhist meditation 
In Buddhism, kasiṇa (Pali; Sanskrit: kṛtsna) refers to a class of basic visual objects of meditation. There are ten kasiṇa mentioned in the Pali Tipitaka: The kasiṇa are typically described as a colored disk, with the particular color, properties, dimensions and medium often specified according to the type of kasiṇa. The earth kasiṇa, ...