So now we have a new one. In Ya'akov Zussman's treatise on the exclusive orality of the Oral law, he says, (MT3, p. 327, n. 25) in talking about the famous mosaic from Rehov (now on display at YU, by the way) that it
מצטרף לעדויות על הפלוקטואציה של הנוסח בספרות חז"ל
In other words, that it demonstrates the malleability of the Talmudic text.
So there you have it. A new word for a future Talmudic lexicon. Fluktuatsia.