red giant(redirected from Red giant branch)
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A low-mass star of great size and luminosity that has a relatively low surface temperature, giving it a reddish or orange hue.
(Celestial Objects) a giant star towards the end of its life, with a relatively low temperature of 2000–4000 K, that emits red light
a star in an intermediate stage of evolution, characterized by a large volume, low surface temperature, and reddish hue.
A star 10–100 times the Sun’s size.