| impressions | <dentistry> The first step in making a model of your teeth. You bite into a container filled with algenate, and the algenate hardens to produce a mold of your teeth. (05 Mar 2000) |
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| impressions for cerebral gyri | The depressions on the inner surface of the skull which correspond to the convolutions of the brain. Synonym: impressiones digitatae, digitate impressions. (05 Mar 2000) |
| impressions of oesophagus | Three narrowings of the oesophagus normally demonstrated radiographically following a barium swallow: the upper or pharyngeal oesophageal constriction, at the beginning of the oesophagus, is caused by the cricopharyngeus muscle, often referred to as the superior oesophageal sphincter; the middle or aortic constriction is a left-sided narrowing due to the oesophagus passing the aortic arch; the inferior or diaphragmatic oesophageal constriction corresponds to the passage of the oesophagus through the oesophageal hiatus of the diaphragm. Synonym: impressions of oesophagus. (05 Mar 2000) |
| digitate impressions | The depressions on the inner surface of the skull which correspond to the convolutions of the brain. Synonym: impressiones digitatae, digitate impressions. (05 Mar 2000) |
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