thall-

combining form

variants or thalli- or thallo-

1

: a young shoot : thallus

Thallophyta

thallium

thalliform

2

: thallium

thallic

Word History

Etymology

New Latin, from Greek thall-, thallo-, from thallos

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