ˈkrɪstələn 
British ˈkrɪstəˌlaɪn
1
: clear and shining like crystal
the island's crystalline waters
—sometimes used figurativelya singer with a crystalline voice [=a beautifully clear voice]
2
technical
: made of or similar to crystal or crystals
a crystalline solid
the rock's crystalline structure
Cite this Entry
“Crystalline.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/crystalline. Accessed 10 Apr. 2026.
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