Cognitive Decline and Language (CDL): Abstract, Index, and Glossary is an e-journal of subject bibliography, for a journey to explore knowledge about how language as a cognitive behavior interacts with brain. It is a companion of CDL Cumulative References, initiated and guided by William S-Y. Wang and Cho-Yee To (Michigan University) of Research Centre for Language, Cognition and Neuroscience (RCLCN), Hong Kong Polytechnic University.