cassegrain telescope

Cas·se·grain tel·escope

C c

Definitions of cassegrain telescope words

noun cassegrain telescope an astronomical reflecting telescope in which incident light is reflected from a large concave paraboloid mirror onto a smaller convex hyperboloid mirror and then back through a hole in the concave mirror to form the image 3
noun cassegrain telescope a reflecting telescope in which the light, passing through a central opening in the primary mirror, is brought into focus a short distance behind it by a secondary mirror. 1

before 1805

One of the 41% newest English words

1805-15; named after N. Cassegrain, 17th-century French scientist, its inventor

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 1% 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.

This diagram is provided by Google Ngram Viewer

Was this page helpful?

Yes No

Thank you for your feedback! Tell your friends about this page

Tell us why?