What is "savoraim"

A Savora (; Aramaic: סבורא, "a reasoner", plural Savora'im, Sabora'im , סבוראים) is a term used in Jewish law and history to signify one among the leading rabbis living from the end of period of the Amoraim (around 500 CE) to the beginning of the Geonim (around 600 CE). As a group they are also referred to as the Rabbeinu Sevorai or Rabanan Saborai, and may have played a large role in giving the Talmud its current structure. Modern scholars also use the plural term Stammaim ( Hebrew; "closed, vague or unattributed sources") for the authors of unattributed statements in the Gemara.