ramsden eyepiece

Ramsden eyepiece

R r

Definition of ramsden eyepiece words

noun ramsden eyepiece an eyepiece consisting of two plano-convex crown-glass lenses of equal focal length, placed with the convex sides facing each other and with a separation between the lenses of about two-thirds of the focal length of each. 1

before 1840

One of the 33% newest English words

1840-50; named after Jesse Ramsden (1735-1800), English maker of astronomical instruments

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 2% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

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