Hey, I know it's a silly thing to ask, but I kind of forgot such terms. Is the moment about the local x-axis (as shown in the figure), transversal or longitudinal moment?
I tend to agree with structSU10 that the moment of a slab spanning in the short direction would be a transverse moment. A moment is a vector quantity having both magnitude and direction and is sometimes represented by a double headed arrow. The direction of a transverse moment is parallel to the long dimension of the body.