Dacryocyst
Dacryocyst: The lacrimal sac; tear sac. The dilated (widened) upper end of the nasolacrimal duct, the passageway that allows tears to drain into the nasal cavity.
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- Dacryocystorhinostomy
Dacryocystorhinostomy: The surgical creation of a passage between the lacrimal sac (tear sac) and the nasal cavity to permit the drainage of tears. Dacryocystorhinostomy may be done to remedy an obstructed nasolacrimal duct.
- Dactyl-, -dactyl
Dactyl-, -dactyl: Prefix or suffix denoting the digits (fingers or toes), as in dactylitis (inflammation of a finger or toe).
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Daily Prayer of a Physician: A prayer that is said to have been written by the twelfth-century physician’ philosopher Moses Maimonides, but possibly penned by German physician Marcus Herz. This prayer is often recited by new medical graduates.
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Daily Value: DV, a term on food labels based on the RDA (Recommended Dietary Allowance) designed to help consumers use food label information to plan a healthy diet. The Daily Value serves as a basis for declaring on the label the percent of the DV for each nutrient that a serving of the food provides. […]
- Daltonism
Daltonism: Colorblindness of the red-green type (also known as deuteranopia or deuteranomaly). The term “Daltonism” is derived from the name of the chemist and physicist, John Dalton (1766-1844). Dalton was born in a village in Cumberland, England where his father, Joseph, was a weaver in poor circumstances. He was educated by his father and John […]