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keystone
Keystone may refer to:
Trivia about keystone
Mentioned in Pennsylvania's state nickname, it's the central topmost support of an arch
The name of this wedge-shaped piece in an arch signifies its place of importance
An arch's wedge-shaped summit piece(8)
(Kelly of the Clue Crew reports from the Exploratorium, San Francisco, CA.) Pressure from both sides on this vital piece is what holds up a catenary arch
(Jimmy of the Clue Crew reports from the LIttle League Museum in Williamsport, PA) The original Little League logo had an eagle. The current one features a baseball diamond inside this architectural shape that represents Pennsylvania, where Little League was founded