·noun A piece or fragment of a broken pot.
A "shred", i.e., anything severed, as a fragment of earthenware (Job 2:8; Prov. 26:23; Isa. 45:9). ...
Easton's Bible Dictionary
also in Authorized Version "sherd," a broken piece of earthenware. (Proverbs 26:23) ...
William Smith's Bible Dictionary