# pydicom.datadict.dictionary_description

`pydicom.datadict.``dictionary_description`(tag)

  Return the description of the element corresponding to tag.

  Only performs the lookup for official DICOM elements.

  Parameters: | tag (int) – The tag for the element whose description is being retrieved.
  Returns: | The description of the corresponding element.
  Return type: | str
  Raises: | `KeyError` – If the tag is not present in the DICOM data dictionary.