soft phosphate

noun

: a powdery impure form of tricalcium phosphate of low fertilizer value occurring in natural deposits of phosphate rock and separated from hard rock and pebble phosphates in fertilizer manufacture

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