- A projecting part of a building, esp. of a church, having in
the plan a polygonal or semicircular termination, and, most often,
projecting from the east end. In early churches the Eastern apse was
occupied by seats for the bishop and clergy. - The bishop's seat or throne, in ancient churches. - A reliquary, or case in which the relics of saints were kept.
Synapse Synapse is the space between two neurons where the axon of a sending neuron communicates with the dendrites of a receiving neuron by using chemical messages.