Puzzles & Games
Word of the Day
Apps by Dictionary
Fiancé or fiancée? What's the difference?
a diffraction pattern used to study crystal structure, consisting of symmetrically arranged spots obtained when a beam of x-rays, electrons, or neutrons is passed through a thin crystal and exposes a photographic plate.
after M. von
, who developed it
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Discover our greatest slideshows
Seven Wacky Words Born in the USA
Rise and Shine: 9 Sunny Words
Jurassic Words: 9 Dinosaur Names...
I Now Pronounce You: 10 Unusual...
Browse more topics on our blog
What Is the Difference Between Discreet and Discrete?
Learn the correct uses of these two commonly confused homophones.
What Character Was Removed from the Alphabet?
What mistaken pronunciation gave this character its name?
This small mark has two primary uses: to signify possession or omitted letters.
How Do I Get a Word into the Dictionary?
People invent new words all the time, but which ones actually make it?
Word of the Day
Difficulty index for
Few English speakers likely know this word
Word Value for
Words With Friends
Nearby words for laue diagram
laudator temporis acti
laugh all the way to the bank
laugh and the world laughs with you
laugh in one's sleeve
laugh in ones sleeve
laugh on the other side of one's face
laugh one's head off
laugh out of court
laugh out of the other side of one's mouth
laugh something off
laugh to scorn
laugh up one's sleeve
laugh, and the world laughs with you; weep, and you weep alone