thallus

noun
thal·​lus | \ˈtha-ləs \
plural thalli\ˈtha-​ˌlī, -​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

First Known Use of thallus

1829, in the meaning defined above

History and Etymology for thallus

New Latin, from Greek thallos, from thallein to sprout; akin to Armenian dalar green, fresh, Albanian dal I come forth

Keep scrolling for more

Learn More about thallus

Dictionary Entries near thallus

thallophyte

thallose

thallous

thallus

thalposis

thalpotic

thalweg

Statistics for thallus

Look-up Popularity

Time Traveler for thallus

The first known use of thallus was in 1829

See more words from the same year

Keep scrolling for more

More Definitions for thallus

thallus

noun
thal·​lus | \ˈthal-əs \
plural thalli\ˈthal-​ˌī, -​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

More from Merriam-Webster on thallus

Rhyming Dictionary: Words that rhyme with thallus

Britannica.com: Encyclopedia article about thallus

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).

WORD OF THE DAY

the figure or shape of a crescent moon

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!