3 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Keystone \Key"stone`\, n. (Arch.)
The central or topmost stone of an arch. This in some styles
is made different in size from the other voussoirs, or
projects, or is decorated with carving. See Illust. of
{Arch}.
{Keystone State}, the State of Pennsylvania; -- so called
from its having been the central State of the Union at the
formation of the Constitution.
From WordNet r 1.6 [wn]:
keystone
n : the central stone at the top of an arch or vault [syn: {headstone}]
From U.S. Gazetteer (1990) [gazetteer]:
Keystone, AL
Zip code(s): 35007
Keystone, CO
Zip code(s): 80435
Keystone, IA (city, FIPS 41115)
Location: 41.99976 N, 92.19858 W
Population (1990): 568 (252 housing units)
Area: 1.0 sq km (land), 0.0 sq km (water)
Zip code(s): 52249
Keystone, IN
Zip code(s): 46759
Keystone, NE
Zip code(s): 69144
Keystone, SD (town, FIPS 33820)
Location: 43.89435 N, 103.42887 W
Population (1990): 232 (137 housing units)
Area: 7.4 sq km (land), 0.0 sq km (water)
Zip code(s): 57751
Keystone, WV (city, FIPS 43516)
Location: 37.41501 N, 81.44626 W
Population (1990): 627 (302 housing units)
Area: 0.8 sq km (land), 0.0 sq km (water)
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