
1) Zen Buddhist terminology
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https://www.crosswordclues.com/clue/bokuseki

Bokuseki (墨跡) is a Japanese term meaning `ink trace`, and refers to a form of Japanese calligraphy (Shodo) and more specifically a style of Zenga developed by Zen monks. Bokuseki is often characterized by bold, assertive, and often abstract brush strokes meant to demonstrate the calligrapher’s pure state of mind (see Samadhi). The aim in m.....
Found on
http://en.wikipedia.org/wiki/Bokuseki

calligraphic style of the Buddhist sects known as Zen in Japan and Ch`an in China. This calligraphic form sprang directly from the transplantation ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/b/87
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