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extant
extemporaneous
extempore
extemporize
extend
extendable bond
extendable note
extended
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extended care facility
extended family
extended-play
extended school
extender
extensible
Extensible Markup Language
extensimeter
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extensor
ex·ten·sor [ ik sténssər ] (plural ex·ten·sors)


noun 
Definition:
 
muscle capable of extending: a muscle that straightens or extends a part of the body, e.g. an arm or leg
[Early 18th century. < modern Latin< Latin extens- (see extension)]
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