wheat aphid

noun

variants or wheat aphis

: any of several plant lice of the family Aphididae (as the grain aphid Macrosiphum granarium and Rhopalosiphum prunifoliae) that suck the sap of growing wheat

called also wheat louse, wheat plant louse

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