The word 'tellin' is a shortening of the modern Latin genus name Tellina, which was established by Carl Linnaeus in the 18th century. Linnaeus likely derived this name from the ancient Greek word tellinē (τελλίνη), which referred to a specific type of shellfish. The Greek term itself may have pre-Greek, Mediterranean origins, indicating a long-standing local name for the creature. Thus, 'tellin' entered English as a direct zoological borrowing, carrying its specific taxonomic meaning without undergoing morphological analysis in common usage.

This word is a modern scientific genus name (Tellina) used as a common name. It is not productively formed from recognizable English morphemes. Its origin is traced to a classical Latin word.