Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

See What's Trending Now See More Trending Words

thyriothecium

noun thy·ri·o·the·ci·um \ ˌthīrēōˈthēs(h)ēəm \

Definition of thyriothecium

plural thyriothecia \-s(h)ēə\
:an ascocarp so inverted that the generative hyphae are dependent

Explore Merriam-Webster

one-green-toy-robot-amidst-many-red-toy-robots
The Exceptions Quiz III
video-title-words-of-the-year-1066
Words of the Year: 1066
image989362072
8 Words for Trickery and Deception
alt-59e8af1b31525
Trending: NY Times: Trump's Call Ignites 'Imbroglio'

There's more!

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!
Already a subscriber? Log in.

Origin and Etymology of thyriothecium

New Latin, irregular from Greek thyreos oblong shield + New Latin -thecium

Seen and Heard

What made you want to look up thyriothecium? Please tell us where you read or heard it (including the quote, if possible).

show hide

Love words? Need even more definitions?

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

WORD OF THE DAY

pelf

play

money or riches

Get Word of the Day daily email!

TRENDING NOW

  1. imbroglio "a public scandal"

  2. spurious of a deceitful nature or quality

  3. righteous We provide an assortment of definitions

  4. Kafkaesque 'A nightmarish quality'

  5. mike "microphone"

SEE ALL

Love words? Need even more definitions?

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

Words at Play

image989362072
8 Words That Put One Over on You

They'll put one over on you

alt-59ee3fc46688e
'Dis': From Early Rap to Academic Journals

The word has quickly taken center stage

alt-59ea52ed7b96f
Learned Fools: On Names for Students

Where did we get 'freshman' and 'sophomore'?

alt-59e900afadac6
The Synonyms 'Discover' and 'Invent'

In the past, you could invent fruit.

Ask the Editors

video-title-words-of-the-year-1066
Words of the Year: 1066

Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

payday
How Often Is 'Biweekly'?

Don't get us started on 'bimonthly'

video-irregardless-grammar-peeve-blend-of-the-synonyms-irrespective-and-regardless
Irregardless

It is in fact a real word (but that doesn't mean you should use it).

video-moose-goose-weird-plurals
Weird Plurals

One goose, two geese. One moose, two... moose. What's up with that?

Word Games

one-green-toy-robot-amidst-many-red-toy-robots
The Exceptions Quiz III

Which of these things doesn't belong?

Take the quiz
knupfer-painting-solon-before-croesus
Forms of Government Quiz

Name that government! Or something like that.

Take the quiz
How Strong Is Your Vocabulary?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Take the quiz
Syn City
Syn City

Build a city of skyscrapers—one synonym at a time.

Play the game