At 35:46
in part 1 of this recording of SpaceX's Hans Koenigsmann's talk at IAC 2018, he says something like:
The green stuff that you see is TEA-TEB, that’s the ignition fluid that they use.
The flame that goes a little bit like up and down, that’s the xxx; the yyy flame. The main flame just goes straight down.
What are the terms represented here as xxx and yyy? If the terms are not obvious, a little further explanation is appreciated.