crystalline has definitions from the field of crystallography
1
[ adjective ] transmitting light; able to be seen through with clarity

Examples

"the cold crystalline water of melted snow" "crystal clear skies" "could see the sand on the bottom of the limpid pool" "lucid air" "a pellucid brook" "transparent crystal"

Related terms

clear

2
[ adjective ] distinctly or sharply outlined

Examples

"crystalline sharpness of outline"- John Buchan

Related terms

distinct

3
[ adjective ] (crystallography) consisting of or containing or of the nature of crystals

Examples

"granite is crystalline"

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