steam harrow

noun

: a device resembling a spike-tooth harrow that is used for sterilizing soil (as in a greenhouse) with steam escaping from openings in short pipes forced into the soil

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now