bipyramid

noun

bi·​pyr·​a·​mid (ˌ)bī-ˈpir-ə-mid How to pronounce bipyramid (audio)
: a crystal consisting of two identical pyramids base to base
bipyramidal
(ˌ)bī-pə-ˈra-mə-dᵊl How to pronounce bipyramid (audio)
adjective

Word History

First Known Use

1824, in the meaning defined above

Time Traveler
The first known use of bipyramid was in 1824

Rhymes for bipyramid

See All Rhymes for bipyramid

Browse Nearby Words

bipunctate
bipyramid
biquadratic
See all Nearby Words

Cite this Entry

“Bipyramid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bipyramid. Accessed 23 Apr. 2025.

Copy Citation

Share

Love words? Need even more definitions?

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

Popular in Grammar & Usage

See More

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

Words in Disguise: Do these seem familiar?

The Difference Between 'i.e.' and 'e.g.'

Democracy or Republic: What's the difference?

Every Letter Is Silent, Sometimes: A-Z List of Examples
See More

Popular in Wordplay

See More

Flower Etymologies For Your Spring Garden

8 Words for Lesser-Known Musical Instruments

Birds Say the Darndest Things

10 Words from Taylor Swift Songs (Merriam's Version)

'Blue Moon,' 'Wolf Moon,' and Other Moons to Look for Throughout the Year
See More

Popular

See More

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)

Flower Etymologies For Your Spring Garden

8 Words for Lesser-Known Musical Instruments
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Word Game Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
Missing Letter A daily crossword with a twist
name that thing flower edition
Name That Flower Can you tell the difference between a lilac and a...
See All