Mithra and his cave are inseparable ideas, and the name spelaeum, antrum, or specus, remained to the end the regular designation of his chapels.
"Roman Society from Nero to Marcus Aurelius"
Samuel Dill
I must, however, observe, that here are assembled the three finest statues in the world, the Laocoon, the Venus de Clomene, from the collection of the Medici family, and the Apollo Belvidere, which was found amongst the ruins of antrum, about the end of the 15th century; and eveu in imagining the most perfect nature, it is difficult to form an idea of such perfection as is here exhibited; but much as I admired the Apollo, I was yet more delighted by contemplating the excellence displayed in the graceful figure of the Venus.
"A tour through some parts of France, Switzerland, Savoy, Germany and Belgium"
Richard Boyle Bernard
An alveolar abscess deeply seated in the maxilla may open into the maxillary antrum and set up suppuration in that cavity.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson