Blue giant
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A blue giant is a huge, very hot, very luminous, blue star; spectral type O or B. It is not a main sequence star but a post-main-sequence star. These rare, incredibly hot stars burn helium with surface temperatures ranging from 11,000 to 25,000 K.
Though not as severe as a blue supergiant, blue giants are still pretty nasty for most carbon life forms, and they are something to avoid, both because of their heat and radiation.
Examples include Rigel, Regulus and Alfanidon.
