Breadcrumb Home > Dictionary > Index L lighthouse tube: Meaning and Definition of Find definitions for: light'house tube" Pronunciation: [key] — Electronics. Electronics. a vacuum tube with the electrodes arranged in parallel layers closely spaced, giving a relatively high-power output at high frequencies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Lighthouse Point Light in August* TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: prescient Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language