Turned into crystals or a solid geometric form, or metaphorically became clear and definite.
From Greek 'krystallos' meaning 'ice' or 'clear quartz,' which became 'crystal' in English, then the verb 'crystallize' and adjective form.
Honeycombs and snowflakes are nature's perfect crystallized structures—water molecules arrange themselves in precise geometric patterns because of how hydrogen bonds work at molecular scales.
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