soap orange

noun

: a wild orange (Citrus aurantium saponacea) of Guam and other Pacific islands that has an inedible fruit with saponaceous pulp

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