episquamosal adjective 1noun 1forms 1 adjective1 •Situated above the squamosal boneThe posterior margin of TMP 2011.051.0001 has four episquamosal loci, all of which are occupied by well-fused episquamosals. — 2015 noun1 •An ossification situated above the squamosal bone formsepisquamosals