The term neural APPENDAGE is composed of two words, 'neural' and 'APPENDAGE'. Neural refers to the nervous system, which is a complex network of cells that transmit signals throughout the body. An APPENDAGE is an external body part, such as an arm or a leg. The crossword solution for this term is 'axon', which is a long, thin fiber that carries electrical signals away from the cell body of a neuron. Axons are essential for the transmission of information within the nervous system.