Bible Encyclopedias
Suspensura

1911 Encyclopedia Britannica

the architectural term given by Vitruvius (v. 10) to the hollow space under the floor of a Roman bath, in which the smoke from the furnace passed to the vertical flues in the wall (see Hypocaust).

Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Suspensura'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​s/suspensura.html. 1910.