1. Plural of frazil; fine, needle-like crystals of ice that form in supercooled water, typically in rivers and streams during winter.
Usage: technical; hydrology; often used in plural form

Examples

• Frazils accumulate in the river during the coldest nights of winter.
• The formation of frazils can affect water flow and navigation in northern rivers.
• Scientists monitor frazils to understand ice dynamics in freshwater systems.
• Frazils may eventually consolidate into thicker ice sheets.
• The presence of frazils indicates water temperatures just below freezing.