Any piece with a bit of root attached will form a new plant.

The term is used especially when the pieces form a right angle.

It felt like a piece of dry ice had just formed in her stomach.

The new piece happens all at once and fully formed.

There are pieces form the 2nd century through the present.

The seven pieces form a rectangle of length 1 by 5/4.

The two pieces then cool together and form a permanent bond.

A separate piece formed the base lining of the pond.

As she stared at the address book, the last piece of evidence, a new idea formed in her mind.

That is, a piece of plastic formed into nearly the shape intended, with a hollow area in the middle.