antrum /an·trum/ (an´trum) pl. an´tra, antrums [L.] a cavity or chamber.an´tral
antrum of Highmore.
antrum (an´trum),
cardiac antrum the short conical portion of the esophagus below the diaphragm, its base being continuous with the cardiac orifice of the stomach.
frontal antrum see under sinus.
antrum of Highmore maxillary sinus.
mastoid antrum , antrum mastoi´deum an air space in the mastoid portion of the temporal bone communicating with the tympanic cavity and the mastoid cells.
antrum maxilla´re , maxillary antrum maxillary sinus.
pyloric antrum , antrum pylo´ricum the dilated portion of the pyloric part of the stomach, between the body of the stomach and the pyloric canal. 
)
Pyloric antrum (antrum pyloricum).
tympanic antrum , antrum tympa´nicum mastoid a.
| antrum of Highmore n. See maxillary sinus. |
antrum of Highmore.
See maxillary sinus.
antrum (an´trum),
n a general term for cavity or chamber that may have specific meaning in referencing certain organs or sites in the body. For example, referring to paranasal sinuses, the maxillary sinus can be referred to as a maxillary antrum.
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