jackhammer

POS

Noun

HYPHEN

jack=ham=mer

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CIDE DICTIONARY

jackhammer, n.

a hammer having a strong steel cutting blade, driven by compressed air in multiple rapid strokes, and used for cutting through pavement, concrete, or other hard substances. [WordNet 1.5]

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OXFORD DICTIONARY

jackhammer, n. US a pneumatic hammer or drill.

For further exploring for "jackhammer" in Webster Dictionary Online

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