Vermiculite (noun)

A hydrous silicate mineral that is light in weight, porous and expands when heated.

Origin:

Mid 19th century: from latin vermiculus "little worm" + -ite.

Examples:

1. Vermiculite is commonly used as insulation in building construction.
2. Vermiculite is often added to soil to improve aeration and water-holding capacity.
3. Vermiculite is found in many different colors, including silver, yellow, and golden brown.
4. Vermiculite is prized for its heat resistance and ability to retain moisture.
5. Vermiculite is used in a wide range of applications, from gardening and agriculture to industrial insulation.