tholoid

noun
tho·loid | \ˈthōˌloid\
plural -s

Definition of tholoid 

: a rounded dome-shaped mass of lava rising above the surface of a lava flow or crater floor

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!

History and Etymology for tholoid

Greek tholos + English -oid, noun suffix

Keep scrolling for more

Learn More about tholoid

Dictionary Entries near tholoid

tholeiite

tholepin

tholobate

tholoid

tholos

Thomaean

Thomas

Statistics for tholoid

Look-up Popularity

Comments on tholoid

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

WORD OF THE DAY

not any or not one

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
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!