脑积水 nǎojīshuǐ hydrocephalus Origin Definitions Defs Strokes Stroke Words Sentences Sents 脑 腦 nǎo noun brain The brain of a person or animal; the organ in the head that controls thought and movement.积水 積水 jīshuǐ edema (medical) to have a buildup of fluid in a part of the body, such as in the brain or joints