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Definition of waldo

waldo

/ˈwɔːl.doʊ/
wal · do
Plural:waldoes
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waldo Lexical Profile

waldo Game Scores & Validity

• noun

1

A mechanical, electronic, or hydraulic device operated by remote control in a manner that mimics the movements of a human hand and arm, used for handling hazardous or radioactive materials or for performing delicate operations from a distance.

Example

"The technician used a pair of waldoes to safely manipulate the radioactive isotopes inside the shielded containment chamber."

Synonyms
View all synonyms for waldo

• Nearby Words

waker
wakerobin
waking
waldo
waldsteinia
wales
walk

Word Origin & Etymology

Coined in 1942 by American science fiction writer Robert A. Heinlein in his short story "Waldo," after the title character Waldo F. Jones, who invents and uses such mechanical hands to overcome his physical weakness.

Cite this Entry

Wordmom. (2026). Definition of Waldo. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/waldo
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