Ramsden eyepiece

noun
Rams·den eyepiece | \ˈramz-dən- \

Medical Definition of Ramsden eyepiece 

: a nearly achromatic optical system that contains two plano-convex lenses with the convex surfaces facing each other and is used especially in instruments fitted with micrometer wires or a scale

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Dictionary Entries near Ramsden eyepiece

ramipril

ramisection

ramose

Ramsden eyepiece

ramulus

ramus

ramus communicans

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