Search the dictionary A Chinese word or character, or English Draw a character Search 4 entries. nèidǎn 内胆 inner container (e.g. the rice pot inside a rice cooker, the vacuum bottle inside a thermos, the tank inside a hot water heater, the bladder of a football) nèidǎn 內膽 inner container (e.g. the rice pot inside a rice cooker, the vacuum bottle inside a thermos, the tank inside a hot water heater, the bladder of a football) nèidān 内丹 Taoist internal alchemy nèidān 內丹 Taoist internal alchemy