Square engine | Article about square engine by The Free Dictionary
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square engine[′skwer ′en·jən]
An engine in which the stroke is equal to the cylinder bore.
A reciprocating engine whose dimension of cylinder bore and stroke is the same.
References in periodicals archive
The square engine
design of the K series, wherein the bore and stroke of the cylinder have the same dimension of 159 mm, has an elegant simplicity through and through.