Geometric isomers are a subset of stereoisomers. Geometricisomerism usually describes cis-trans relationships only.Stereoisomers describes compounds that differ in the 3- Dorientation, which includes geometric isomers. Otherstereoisometric relationships include enatiomers (mirror images)and meso compounds. Solution Geometric isomers are a subset of stereoisomers. Geometricisomerism usually describes cis-trans relationships only.Stereoisomers describes compounds that differ in the 3- Dorientation, which includes geometric isomers. Otherstereoisometric relationships include enatiomers (mirror images)and meso compounds..