sleet 
(slēt)
(slēt)n.
1. Precipitation consisting of small ice pellets formed by the freezing of raindrops or of melted snowflakes.
2. A mixture of rain and snow or hail.
3. A thin icy coating that forms when rain or sleet freezes, as on trees or streets.
intr.v. sleet·ed, sleet·ing, sleets
To shower sleet.
[Middle English slete, probably from Old English *slēte; akin to German Schlosse, hail.]
sleety adj.