胸鳍 xiōngqí pectoral fin Origin Definitions Defs Strokes Stroke Words Sentences Sents 胸 xiōng noun chest the part of the body between the neck and the stomach; chest; bosom; thorax鳍 鰭 qí fin The organ of a fish or other aquatic vertebrate used for movement and steering; it consists of a membrane supported by bony or cartilaginous spines.