n. A precipitation that forms when supercooled droplets of water condense on a snowflake.
n. The result of this process, a small ball of rime.
The Century Dictionary and Cyclopedia
n. A form of soft hail or half-melted snow or sleet.
Word Usage
"But even below that, there was the type of frozen precipitation known as graupel, which "certainly looked like real snow," said Stuart Seto, a specialist at the weather service."