Category: A
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Ampullitis
Inflammation of any ampulla, especially of the ductus deferens.
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Ampulla of uterine fallopian tube
The dilated distal end of a uterine tube terminating in a funnel-like infundibulum.
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Ampulla of semicircular ducts
Dilatation of semicircular ducts near their junction with the utricle. In their walls are the cristae ampullares.
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Ampulla of semicircular canal
In the inner ear, one of the dilations at the ends of the three bony semicircular canals that house an ampulla of a semicircular duct. These dilations house the corresponding dilations (ampullae) of the semicircular ducts inside the canals.
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Ampulla of rectum
Slight dilatation of the rectum proper just before continuing as the anal canal. Also called infraperitoneal portion of rectum proper.
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Ampulla of lacrimal duct
Slight dilatation of the lacrimal duct medial to the punctual.
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Ampulla ductus deferentis
An irregular and nodular dilatation of the vas deferens just before its junction with the secretory duct of the seminal vesicle.
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Amplitude modulation
Altering the height (amplitude) of an electrical or acoustical wave.
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Amplifier
That which enlarges, extends, increases, or makes more powerful.
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Amplicon
An amplified segment of specific DNA or RNA sequences, i.e., one in which multiple copies of the nucleic acid sequences are found. Amplicons can be made during polymerase chain reactions or may occur spontaneously, e.g., in the nucleic acid content of certain organisms or tumors.