Category: I
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Ischial spine
The spine of the ischium, a pointed eminence on its posterior border.
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Ileocecal sphincter
A projection of the ileum into the cecum that acts as a sphincter.
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Interjectional speech
Speech into which gestures, ejaculatory sounds, and other nonverbal mannerisms are introduced.
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Invisible spectrum
The portion of the spectrum either below the red (infrared) or above the violet (ultraviolet), which is invisible to the eye, the waves being too long or too short to affect the retina. The invisible spectrum includes rays less than 3900 A in length (ultraviolet, roentgen or x, gamma, and cosmic rays) and those exceeding…
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Infrared absorption spectroscopy
A technique that uses the infrared absorbing properties of molecules to determine their presence in tissues or body fluids. A common clinical application is in the design of oximeters.
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Intervillous space
Any area of the maternal side of the placenta where transfer of maternal oxygen, nutrients, and fetal wastes occurs.
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Interradicular space
The area between the roots of a multirooted tooth, which contains an alveolar bony septum and the periodontal ligament.
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Isosmotic solution
A solution with the same osmotic pressure as the solution with which it is being compared. A solution with osmotic pressure equal to that of blood serum.
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Isohydric solution
A solution having the same hydrogen ion concentration or pH as another.
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Isobaric solution
A solution with a specific gravity equal to one or equal to the solution with which it is being compared.