transept
Concise Oxford English Dictionary © 2008 Oxford University Press:
transept /ˈtransɛpt, ˈtrɑːn-/
▶noun (in a cross-shaped church) either of the two parts forming the arms of the cross shape, projecting at right angles from the nave.
– derivatives
transeptal adjective.
transeptal adjective.
'transept' also found in these Oxford entries:

