Transept
In a cruciform or cross-shaped church building, the parts of the building which are the two lateral arms of the cross. The transepts extend from the nave and chancel.
Glossary definitions provided courtesy of Church Publishing Incorporated, New York, NY,(All Rights reserved) from “An Episcopal Dictionary of the Church, A User Friendly Reference for Episcopalians,” Don S. Armentrout and Robert Boak Slocum, editors.