SINCE 1828
thallus
noun
thal·lus
| \ ˈtha-ləs
\
\
plural thalli\ ˈtha-ˌlī
, -ˌlē \
or thalluses
, -ˌlē \
or thalluses
Definition of thallus
: a plantlike vegetative body (as of algae, fungi, or mosses) that lacks differentiation into distinct parts (such as stem, leaves, and roots) and does not grow from an apical point
Keep scrolling for more
Keep scrolling for more
More Definitions for thallus
thallus
noun
thal·lus
| \ ˈthal-əs
\
\
plural thalli\ ˈthal-ˌī
, -ˌē
\
or thalluses
, -ˌē
\
or thalluses
Medical Definition of thallus
: a plant or plantlike body (as of an alga, fungus, or moss) that lacks differentiation into distinct members (as stem, leaves, and roots) and does not grow from an apical point
Comments on thallus
What made you want to look up thallus? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Time Traveler Quiz: Which Word Came First?
-
- Which came first?
Test your knowledge - and maybe learn something along the way.
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
-
Time Traveler Quiz: Which Word Came First?
Which word entered the English language first?
Take the quiz -
Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quiz -
True or False?
Test your knowledge - and maybe learn something along the way.
Take the quiz -
Word Winder's CrossWinder
Play the game
Share thallus
Resources for thallus