水坛 (水壇) shuǐ tán

shuǐ tán noun water altar; water mandala
Domain: Buddhism 佛教 , Subdomain: , Concept:
Notes: Used in esoteric rituals, including homa or fire ceremonies (FGDB '水壇'; SH '水壇', p. 159; Shinohara, 2014, pp. 59-60)