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jumpmaster

[juhmp-mas-ter, -mah-ster] /ˈdʒʌmpˌmæs tər, -ˌmɑ stər/
noun
1.
a person who supervises the jumping of paratroopers or other parachutists.
Origin
1940-1945
1940-45; jump + master
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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