a hole made by a burrowing or gnawing worm, as in timber, nuts, etc.
a theoretical passageway in space between a black hole and a white hole.

1585–95; worm + hole

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World English Dictionary
wormhole (ˈwɜːmˌhəʊl)
1.  a hole made by a worm in timber, plants, etc
2.  physics a tunnel in the geometry of space--time postulated to connect different parts of the universe

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1593, "hole made by a burrowing insect" (in fruit, etc.), from worm + hole. Astrophysics sense is attested from 1957.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
wormhole   (wûrm'hōl')  Pronunciation Key 
  1. A hole made by a burrowing worm.

  2. A theoretical distortion of space-time that would link points in space through a second set of paths, some of which could be shorter than the shortest path without the wormhole. It is not known whether workholes are possible. See more at space-time.

The American Heritage® Science Dictionary
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