Symmetrically synonyms and antonyms

His hands were symmetrically placed on the green silk quilt, the palms downward.

This produces an opening and closing of the edges symmetrically with respect to the telescope axis.

These examples show that Napier was in possession of all the conventions and attributes that enable the decimal point to complete so symmetrically our system of notation, viz.

From the fact that reduction products containing either one or two double linkages behave exactly as unsaturated aliphatic compounds, being readily reduced or oxidized, and combining with the halogen elements and haloid acids, it seems probable that in benzenoid compounds the fourth valencies are symmetrically distributed in such a manner as to induce a peculiar stability in the molecule.