| Hollenhorst plaques | Glittering, orange-yellow, atheromatous emboli in the retinal arterioles that contain cholesterol crystals and originate in the carotid artery or great vessels. (05 Mar 2000) |
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| Hollenhorst, Robert | <person> U.S. Ophthalmologist, *1913. See: Hollenhorst plaques. (05 Mar 2000) |
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| Randall's plaques | Mineral concentrations of renal papillae. (05 Mar 2000) |
| senile plaques | Microscopic argyrophilic masses composed of fragmented axon terminals and dendrites surrounding a core of amyloid. They are seen in small amounts in the cerebral cortex of normal elderly people and in larger amounts in those with alzheimer disease. (12 Dec 1998) |