amphithecium

noun
am·​phi·​the·​ci·​um
plural amphithecia\ -​ēə \

Definition of amphithecium

1 : the external layer of cells surrounding the sporogenous tissue in the sporangium of a moss
2 : the inner layer of the perithecium next to the hymenium in certain lichens

First Known Use of amphithecium

1872, in the meaning defined at sense 1

History and Etymology for amphithecium

New Latin, from amphi- + -thecium

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!

Learn More About amphithecium

Time Traveler for amphithecium

Time Traveler

The first known use of amphithecium was in 1872

See more words from the same year

Dictionary Entries Near amphithecium

amphithecial

amphithecium

amphithyron

See More Nearby Entries 

Statistics for amphithecium

Cite this Entry

“Amphithecium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amphithecium. Accessed 2 Oct. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

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!