The term "presynaptic cell" refers to the neuron that sends signals to another neuron at a synapse. There are several synonyms for this term, including "predecessor neuron," "sending neuron," "afferent neuron," and "input neuron." These terms represent the various ways that presynaptic cells are described in different contexts, but they all refer to the same basic concept of a neuron that is responsible for transmitting signals to other neurons. Understanding the different words used to describe presynaptic cells is important for researchers studying the neural system to better understand its various mechanisms and functions.