What is eutectic halt?

Answer 1

Hay.
I thick the simplest way of defining the eutectic halt is when a liquid with lets say a slope with like a 45 degree angle slowly moves to 90 and instantly moves to 180degrees (eutectic solidifying) for a long period before cooling further the longest halt will give the eutectic composition and the melting temperature when the slope is equal to zero (horizontally)
Sry

I tried to be simple :D