bean aphid

noun

variants or less commonly bean aphis

: an aphid attacking bean plants

specifically : a dull black or dark green aphid (Aphis fabae or A. rumicis) that feeds in great numbers on succulent parts of many cultivated and native plants

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