thallo-

American  

especially before a vowel, thall-

1. a combining form meaning “young, green shoot,” used in the formation of compound words: thallium.

2. a combining form representing thallus in compound words: thallophyte.

3. a combining form representing thallium in compound words: thallic.

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Etymology

Origin of thallo-

From Greek, combining form of thállos “green shoot, young branch”