noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Initialism of Tip of the Red Giant Branch; A classification of stars on the Hertzsprung-Russell diagram for all stellar populations or of a given sample set, the end of the plot for stars existing on the red giant branch as it branches off from the main sequence. abbreviation, alt-of, countable, initialism, uncountable
2. 2
   Ellipsis of TRGB star (“a star in this classification”). abbreviation, alt-of, countable, ellipsis, uncountable

Related phrases

TRGB populationTRGB star

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.