Breadcrumb Home > Dictionary > Index Z zenith tube: Meaning and Definition of Find definitions for: ze'nith tube" Pronunciation: [key] — Astron. Astron. a telescope mounted to point only at the zenith, used at some observatories for measuring time by the stars. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zenith distance Zeno TrendingHere are the facts and trivia that people are buzzing about. Hard Labor Current Events This Week: June 2023 Languages Spoken in Each Country of the World User's Guide to Environmental Language The Washington Monument: Facts, History & Profile LGBT Pride Month | Biographies of Notable Individuals Civilian Labor Force ✖ Related Content Daily Word Quiz: poetaster Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language