blue hook star

Etymology
From their location on the blue horizontal branch portion of the extreme horizontal branch part of the horizontal branch of stellar evolution, hooking upwards when plotted on an H-R diagram.

Noun

 * 1)  a type of helium-burning blue giant star that is hotter than the average star in this stage of their life, due to having a more massive helium core

Hypernyms

 * / blue giant
 * (BHB star)
 * (EHB star)
 * (HB star)