海胆 hǎidǎn sea urchin Definitions Defs Origin Strokes Stroke Words Sentences Sents 海 hǎi noun sea ocean or sea; large bodies of water including salt lakes or large inland lakes胆 膽 dǎn noun gallbladder The gallbladder; a bitter organ located near the liver that aids in digestion; also referred to as 胆囊 dǎnnáng.