Using the D0 detector at the 1.8 TeV (p)over-bar-p Fermilab Tevatron collid
er, we have measured the inclusive dijet mass spectrum in the central pseud
orapidity region [eta(jet)] less-than 1.0 for dijet masses greater-than 200
GeV/c(2). We have also measured the ratio of spectra sigma([eta(jet)] less
-than 0.5)/sigma(0.5 less-than [eta(jet)] less-than 1.0). The order alpha(s
)(3) quantum chromodynamics predictions are in good agreement with the data
and we rule out models of quark compositeness with a contact interaction s
cale less-than 2.4 TeV at the 95% confidence level.