Any of a number of very soft, monoclinic, hydrous silicate minerals resulting usually from alterations of mica and occurring in tiny, leafy scales that expand greatly when heated: used for insulation, water adsorption, etc.
Webster's New World
Other Word Forms of Vermiculite
Origin of Vermiculite
Latin vermiculus, wormlet for its fibrous nature and tendency to expand into worm-like shapes when heated
Latin vermiculusdiminutive ofvermiswormvermicular–ite
American Heritage Dictionary of the English Language, 5th Edition
Vermiculite Sentence Examples
The material is supplied to the contractor as a dry powder made up of cement and exfoliated vermiculite.
Typical sprays are based on gypsum or cement, with added vermiculite or mineral wool.
Into this I mix vermiculite to help with moisture retention.
For those seeds needing to be covered use fine vermiculite instead of compost.
A snapshot of a hydrated vermiculite clay, in which the clay layer spacing is 4nm.