Sherd
（重定向自Potsherd）
In archaeology, a sherd, or more precisely, potsherd, is commonly a historic or prehistoric fragment of pottery, although the term is occasionally used to refer to fragments of stone and glass vessels as well.
Occasionally, a piece of broken pottery may be referred to as a shard. While the spelling shard is generally reserved for referring to fragments of glass vessels the term does not exclude pottery fragments. The etymology is connected with the idea of breakage, from Old English sceard, related to Old Norse skarth, "notch", and Middle High German scharte, "notch".