Each army has a selection of units and vehicles, though they fall into equivalent groups.

If there are symmetry operations relating equivalent groups, two other factors have to be considered.

Does he have an equivalent group of enemies, perhaps?

Homotopic groups in a chemical compound are equivalent groups.

Larger groups of tabors, equivalent to regiments or brigades, were also employed.

The group, equivalent to an infantry regiment, equalled or exceeded the killed-in-action of 15 ground force divisions.

Once equivalent groups have been formed, the experimenter tries to treat them identically except for the one variable that he or she wishes to isolate.

The League of German Girls was the equivalent group for girls.

Today the story is often recast in a more modern setting where the people are ones in equivalent social groups known not to interact comfortably.

In 1995, the equivalent group had just $30,700, adjusted for inflation.