top onion

noun

1

: one of the bulbils that often replace the flowers in the inflorescence of some onions and are used for propagation

called also top set

compare tree onion

2

: tree onion

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