disphenoid

noun
di·​sphenoid | \ (ˈ)dī+ \

Definition of disphenoid

1 : a wedge-shaped crystal form of the tetragonal or orthorhombic system having four like triangular faces that correspond in position to alternate faces of the tetragonal or orthorhombic dipyramid and being symmetrical about each of three mutually perpendicular diad axes of symmetry in all classes except the tetragonal-disphenoidal in which the form is generated by an inverse tetrad axis of symmetry
2 : a form of crystal bounded by eight scalene triangles arranged in pairs : the tetragonal scalenohedron

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!

Other Words from disphenoid

disphenoidal \ (¦)dī+ \ adjective

History and Etymology for disphenoid

di- + sphenoid

Learn More About disphenoid

Dictionary Entries Near disphenoid

Dispharynx

disphenoid

Dispholidus

See More Nearby Entries 

Statistics for disphenoid

Cite this Entry

“Disphenoid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/disphenoid. Accessed 29 Jun. 2022.

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

WORD OF THE DAY

Test Your Vocabulary

Odd Habits and Quirks

  • image1926873504
  • Which of the following best describes an easily irritated person?
True or False

Test your knowledge - and maybe learn something along the way.

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!