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The Collaborative International Dictionary
Antrum

Antrum \An"trum\, n.; pl. Antra. [L., fr. Gr. ?.] A cavern or cavity, esp. an anatomical cavity or sinus.
--Huxley. [1913 Webster] ||

Douglas Harper's Etymology Dictionary
antrum

"a cave or cavity," late 14c., medical Latin, from Greek antron "cave."

Wiktionary
antrum

n. (context biology English) A bodily cavity, especially one having bony walls, especially one in the sinuses.

WordNet
antrum
  1. n. a natural cavity or hollow in a bone

  2. [also: antra (pl)]

Wikipedia
Antrum

In biology, antrum is a general term for a cavity or chamber, which may have specific meaning in reference to certain organs or sites in the body.

In vertebrates, it may refer specifically to:

  • Antrum cardiacum, a dilation that occurs in the esophagus near the stomach (forestomach)
  • Antrum follicularum, the cavity in the epithelium that envelops the oocyte
  • Mastoid antrum, a cavity between the middle ear and temporal bone in the skull
  • Pyloric antrum, the initial portion of the pyloric part of the stomach. This is what is usually referred to as "antrum" in stomach-related topics.
  • Maxillary antrum or antrum of Highmore, the maxillary sinus, a cavity in the maxilla and the largest of the paranasal sinuses

In invertebrates, it may refer specifically to:

  • Antrum of female lepidoptera genitalia

Usage examples of "antrum".

Von Langenbeck of Berlin mentions an instance of fracture of the superior maxilla, in which the eyeball was so much displaced as to lodge in the antrum of Highmore.

His desk, unlike the others in the antrum, thrown together and wobbly, was an elaborate sectional apparatus with automatic drawers, a pop-up typewriter, modular shelving and a built-in pencil sharpener that operated on batteries.

Where the floor of the antrum curved severely upward he put the heel of his shoe to a large flat stone and kicked it right through the natural hatch in the earth where it had been wedged.

And, to finish the story, and still helping her I started for Chicago to try and locate a doctor who would put the surgically correct antrum opening in it and the antrum tube in it.

The only time the antrum is ever entered in any other way is if the man is minus teeth and has to retain that first molar to chew on.

The doctor grumpily surveyed the gold antrum plug, then dipped its head in the solution again, and repeated his operation of shaking off the drops and letting the film of acid work.

The explanation of these exhibitions is as follows: The instrument enters the mouth and pharynx, then the esophagus, traverses the cardiac end of the stomach, and enters the latter as far as the antrum of the pylorus, the small culdesac of the stomach.

It has its roots there in the antrum and it has grown upwards, under the cheekbone, into the eye socket, and downwards into the gullet.

But the stolid tree--a bloodwood, all bone, toughened by death, a few ruby crystals in sparse antra all that remained significant of past life--afforded but meagre hospitality to the, soft lead.

Adonai Eloim, Adonai Jehova, Adonai Sabaoth, Metraton On Agla Mathon, verbum pythonicum, mysterium salamandrae, conventus sylvorum, antra gnomorum, daemonia Coeli God, Almonsin, Gibor, Jehosua, Evam, Zariatnatmik, veni, veni, veni.

The explanation of these exhibitions is as follows: The instrument enters the mouth and pharynx, then the esophagus, traverses the cardiac end of the stomach, and enters the latter as far as the antrum of the pylorus, the small culdesac of the stomach.