antrum (redirected from tympanic antrum, antrum tympanicum)

antrum /an·trum/ (an´trum) pl. an´tra, antrums   [L.] a cavity or chamber.an´tral

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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.

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an·trum (ntrm)

n. pl. an·tra (-tr)

1. A nearly closed cavity or chamber, especially in a bone.

2. The pyloric end of the stomach, partially shut off during digestion from the cardiac end by sphincter muscles in the stomach wall.

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antral (-trl) adj.

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antrum

pl. antra

Etymology: Gk, antron, cave

a cavity or chamber that is nearly closed and usually surrounded by bone. The antrum cardiacum is a dilation of the esophagus. The fluid-filled cavity in a mature graafian follicle is also termed an antrum.

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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.

antrum, maxillary,

n See sinus, maxillary.

antrum of Highmore,

n.pl See sinus, maxillary.

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antrum

pl. antra [L.] a cavity or chamber.

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mastoid antrum

an air space in the human mastoid portion of the temporal bone communicating with the middle ear and the mastoid cells.

maxillary antrum, antrum maxillare

maxillary sinus, especially of humans.

pyloric antrum, antrum pyloricum

the lumen of the pyloric part of the stomach; the pump of the stomach, regulating the propulsion of food through the pylorus into the duodenum.

tympanic antrum, antrum tympanicum

mastoid antrum.