• WordNet 3.6
    • n antrum a natural cavity or hollow in a bone
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Webster's Revised Unabridged Dictionary
    • n Antrum A cavern or cavity, esp. an anatomical cavity or sinus
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Century Dictionary and Cyclopedia
    • n antrum A name of various cavities in the body, but when used alone signifying the antrum Highmorianum (cavity of Highmore, also called sinus maxillaris), a cavity in the superior maxillary bone, lined with mucous membrane and communicating with the middle meatus of the nose.
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Webster's Revised Unabridged Dictionary
L., fr. Gr.


In literature:

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." by Alexander Miles
The cave is the Antrum Corysium of the Poets.
"The Chronicle of the Discovery and Conquest of Guinea" by Gomes Eannes de Azurara
The antrum may be entirely wanting, as in Fig.
"Degeneracy" by Eugene S. Talbot
I found the tumor occupying the whole of the antrum.
"New, Old, and Forgotten Remedies: Papers by Many Writers" by Various

In news:

Ectopic eruption of a tooth is common in the dental arch, palate, and nose, but it is rare in the maxillary antrum.
Oesophagogastroduodenoscopy showed a mass in the antrum.