rosin soap

noun

1

or rosined soap : soap (as yellow soap) made from rosin as well as fat

2

a

: a resin soap made from rosin

b

: disproportionated rosin

Word History

First Known Use

1784, in the meaning defined at sense 1

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