antrum

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antrum

 [an´trum] (pl. an´tra, antrums) (L.)
a cavity or chamber. adj., adj an´tral.
antrum of Highmore maxillary sinus.
mastoid antrum an air space in the mastoid portion of the temporal bone communicating with the middle ear and the mastoid cells.
antrum maxilla´re (maxillary antrum) maxillary sinus.
pyloric antrum (antrum pylo´ricum) the proximal, expanded portion of the pyloric part of the stomach.
tympanic antrum (antrum tympa´nicum) mastoid antrum.

an·trum

, gen.

an·tri

, pl.

an·tra

(an'trŭm, -trī, -tră), [TA] Do not confuse this word with atrium.
1. Any nearly or relatively closed cavity.
2. Synonym(s): pyloric antrum
[L. fr. G. antron, a cave]

antrum

(ăn′trəm)
n. pl. an·tra (-trə)
1. A cavity or chamber, especially one in a bone.
2. Either of the sinuses in the bones of the upper jaw, opening into the nasal cavity.

an′tral adj.

an·trum

, pl. antra (an'trŭm, -tră) [TA]
1. Any nearly closed cavity, particularly one with bony walls.
2. Synonym(s): pyloric antrum.
[L. fr. G. antron, a cave]

antrum

A hollow cavity or sinus in a bone. The maxillary antrums (or antra) are the cavities in the cheek bones. The mastoid bones, below and behind the ears, contain the mastoid antrums (antra). From the Latin antrum , a cave.

an·trum

, pl. antra (an'trŭm, -tră) [TA] Do not confuse this word with atrium.
Any nearly or relatively closed cavity.
[L. fr. G. antron, a cave]