An example of a solid forming in an undercooled liquid is an ice crystal (solid) growing inside a glass of pure water (liquid} that is cooled below its freezing point.
(An example of a solid forming in an undercooled liquid; is; an ice crystal (solid) growing inside a glass of pure water (liquid}) (an ice crystal (solid; growing; L:inside a glass of pure water) (liquid; is cooled; T:below its freezing point)
An example of a solid forming in an undercooled liquid an ice crystal (solid liquid
is growing is cooled
an ice crystal (solid) growing inside a glass of pure water (liquid}
L:inside a glass of pure water
T:below its freezing point