Boyd’s Bible Dictionary:
(pot-fragment). A piece of broken pottery (Prov. 26:23).
Concise Bible Dictionary:
2-3rd Century AD Pottery Shard
A fragment of pottery, to which man is compared when he strives with his Maker (Isa. 45:9). David quotes the word in the Psalm prophetical of the Lord’s sacrificial sufferings, “My strength is dried up like a potsherd” (Psa. 22:15). It is employed literally in Job 2:8; Proverbs 26:23 and translated “sherd” in Isaiah 30:14 and Ezekiel 23:34.