What is Byakugou? - Tsunade's Ultimate Technique

We learned new word for today.. .Byakugou.  It sounds like Byakugan from the Hyuga Clan. In Manga 577, Tsunade's used it in battling against Madara as it sounds like it's a desperate moves for a Medical Ninja. As what Tsunade's mentioned that the Medical Ninja should not allowed to fight or join any battle  to increase the mission success rate but in desperate times comes with desperate measures. 

Byakugou!!!! (what the hell I just said??)

In Manga it said to be its a "The Mitotic Regeneration Jutsu"...

Mitotic means it will clone or multiply your cells rapidly, so to make the story short it will fasten or enhance ones  regeneration/healing technique. Simply as whatever damage you'll take, you will get recover at no time... cool, you're invulnerable.

mi·to·sis (m-tss)

n. pl. mi·to·ses (-sz) Biology

1. The process in cell division by which the nucleus divides, typically consisting of four stages, prophase, metaphase, anaphase, and telophase, and normally resulting in two new nuclei, each of which contains a complete copy of the parental chromosomes. Also called karyokinesis.

2. The entire process of cell division including division of the nucleus and the cytoplasm.

dictionary source 

This conclude that .. Tsunade's definitely still alive because she's will regenerate after the blow from Madara. We've seen those pose so many times and she'll 100% get back in action.  I remember Orichomaru has this same kind of technique but it something like a reptile regeneration ability. We thought Onoki was gonna die but damn he's still alive, now Tsunade for sure won't die that easily... as she's the only remaining of the 3 Legendary Sannin.
(hey Jiraiya is still alive,.. that's the next story..)

ohh... this thing goes all over my body.. 

...that's a good sensation...