[1] : The Collaborative International Dictionary of English v.0.48

keystone state \key"stone` state\
   pennsylvania; -- a nickname alluding to its having been the
   central one of the 13 original united states, at the time of
   formation of the constitution.
   webster 1913 suppl.

[2] : WordNet (r) 2.0

keystone state
     n : a mid-atlantic state; one of the original 13 colonies syn:
         pennsylvania, pa
see also:
pennsylvania pa 

Garden State >> G Words
Garden State, definition of term: Garden State
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Gem State >> G Words
Gem State, definition of term: Gem State
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Granite State >> G Words
Granite State, definition of term: Granite State
granite+state_pag1.html

Hawkeye State >> H Words
Hawkeye State, definition of term: Hawkeye State
hawkeye+state_pag1.html

Badger State >> B Words
Badger State, definition of term: Badger State
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Financial State >> F Words
Financial State, definition of term: Financial State
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Buckeye State >> B Words
Buckeye State, definition of term: Buckeye State
buckeye+state_pag1.html

Empire State >> E Words
Empire State, definition of term: Empire State
empire+state_pag1.html

City State >> C Words
City State, definition of term: City State
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Coyote State >> C Words
Coyote State, definition of term: Coyote State
coyote+state_pag1.html

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