Dictionary.net

• A rope hung from a balloon or dirigible so as trail along the ground for about half its length, used to preserve altitude automatically, by variation of the length dragging on the ground, without loss of ballast or gas.

2010 - New Age Dictionary Database
By Oddity Software

• A rope hung from a balloon or dirigible so as trail along the ground for about half its length, used to preserve altitude automatically, by variation of the length dragging on the ground, without loss of ballast or gas.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.