pilot balloon


noun

a balloon for the visual observation of upper-atmosphere wind currents.

Origin of pilot balloon

First recorded in 1840–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pilot balloon

  • Still another device employed by meteorologists is the pilot-balloon.

    The Mentor: The Weather|Charles Fitzhugh Talman

British Dictionary definitions for pilot balloon

pilot balloon


noun

a meteorological balloon used to observe air currents
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012