Caterpillar (noun)

1. The worm-like larval stage of a butterfly or moth.
2. A slow-moving tracked vehicle used for construction or farming.

Origin:

From the middle english word "catirpel", derived from the old french "catepelose", which in turn comes from the late latin "catta pilosa" meaning "hairy cat".

Examples:

1. The caterpillar was munching on the leaves of the plant.
2. The children were fascinated by the caterpillar's transformation into a butterfly.
3. The caterpillar was a popular attraction at the insect exhibit.
4. The construction company used the caterpillar to move heavy loads of dirt and rocks.
5. The farmer relied on the caterpillar to plow his fields.