Vermicast

Part of speech: noun

Definitions

1. A nutrient-rich organic matter resulting from the digestion of organic materials by earthworms that improves soil fertility and structure
2. A valuable soil enhancement derived from worm excretions that helps in increasing nutrient availability and moisture retention for plants
3. A rich organic substance produced by earthworms that enhances soil health by improving nutrient levels and water retention for plant growth

Etymology: "Vermicast" is a compound built from Latin roots: "vermis," meaning "worm," and "castus," the past participle of "cast" in the sense of something thrown or ejected, here applied to the material earthworms eject from their bodies. The "vermi-" element is the same one found in "vermicelli," literally "little worms," and in "vermin," a term that originally applied to any small creeping creature before narrowing to pests. The word is a modern technical coinage rather than an ancient one. Earthworms were studied seriously in the eighteenth and nineteenth centuries, most famously by Charles Darwin, who spent decades measuring how worms turn soil over. Scientists needed a precise name for the castings, and they built one from classical materials, as they did for many naturalists' terms of the period. Gardeners today use the word for worm castings, the nutrient-rich material that improves soil structure and water retention. The term's central idea remains simple: it names what the worm leaves behind after digesting soil and organic matter.

Synonyms: worm castings, vermicompost