crystalline
Americanadjective
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of or like crystal; clear; transparent.
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formed by crystallization.
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composed of crystals.
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pertaining to crystals or their formation.
adjective
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having the characteristics or structure of crystals
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consisting of or containing crystals
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made of or like crystal; transparent; clear
Other Word Forms
Etymology
Origin of crystalline
1350–1400; Middle English cristal ( l ) yn ( e ) < Latin crystallinus < Greek krystállinos. See crystal, -ine 1
Explanation
Things that are made of or resemble crystals are crystalline. Crystalline rocks you find on the beach are glittery and reflective, with many symmetrical planes or surfaces. A geologist will use the adjective crystalline very literally, describing crystalline chunks of quartz or the crystalline planes of a salt molecule seen under a microscope. Sometimes the word is also used to mean "extremely clear," like the crystalline prose of a short story or the crystalline forms of your striking black-and-white photography. The Greek source is krystallinos, "of crystal," from kryos, "frost."
Vocabulary lists containing crystalline
Earth Science - Middle School
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Structure and Properties of Matter - Middle School
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Rocks and Minerals - Introductory
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Their measurements revealed pairs of conducting edge states, a defining feature of topological crystalline insulators.
From Science Daily ● Jul. 11, 2026
For those, to put it more generously, pulled in by the simple pleasures and crystalline profundities of the text.
From The Wall Street Journal ● Jul. 2, 2026
Ceuzany's voice ranges from crystalline highs to deep lows, as she performs everything from jazz to slam, commanding the stage with wavy blonde hair and earrings framing her radiant face.
From Barron's ● Jul. 2, 2026
For under $5, I would strongly recommend a box of Turbinado sugar, which retains some of its natural molasses and gives desserts this deeply satisfying crystalline crunch.
From Salon ● May 25, 2026
Often the crystalline air formed mirages, and the sailors saw icebergs suspended upside down on the horizon.
From "Shipwreck at the Bottom of the World" by Jennifer Armstrong
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
