/ Dictionary / Index C Cassegrain telescope: Meaning and Definition of Find definitions for: Cas'se•grain tel'escope Pronunciation: (kas'u-grān"), [key] — Astron. Astron. 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. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cassava Cassel Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language