That is, the birds now categorized the pictures in each set as functionally equivalent.

When used as a monophthong, it is functionally equivalent to the Vietnamese letter 'i'.

The reference cell is functionally equivalent to an array of length 1.

But there should be many functionally equivalent pathways to a similar end result.

"That," he said, "is functionally equivalent to a quota system."

The scientific team is confident that a functionally equivalent protein exists in humans as well.

Each vent microcompartment is functionally equivalent to a single cell.

Some are functionally equivalent to an Arduino and may be used interchangeably.

As such, California domestic partnerships are functionally equivalent to civil unions offered in several other states.

For example, here's an alternative that is functionally equivalent to (1).