Subitizing: what is it? ... Numerosity (sometimes called subitizing) is the most basic of these abilities; it involves quickly determining the quantity of up to about four items or events without counting.

What is a Numerosity?

Legal Definition of numerosity

: the requirement that members of a proposed class formed for a class action be so numerous as to make joinder of the members impracticable.

What does word Chillicothe mean?

The town's name comes from the Shawnee Chala·ka·tha (Chillicothe in English), meaning "principal town", because it was the chief settlement of that division (one of five major divisions) of the Shawnee people. In 1798, Ross County became incorporated with Chillicothe as the county seat.