And that's really what is needed for the concept of size you know.

It took more than a century for the concept to catch on.

For the more general concept behind these schools, see the article alternative education.

She made the gesture for the concept at the same time.

I have no idea how long it took for the initial concept to form in my mind.

It will take several years for the concept to prove itself.

Often the word "unit" is used for the same concept.

Car and Automobile are both terms for the same concept.

The group has worked with some big international figures for the album's concept.

In many cases, multiple terms exist for the same concept.