Definition of subdwarf in US English:

subdwarf

noun

  • 1A tree, especially a cultivar, that is smaller than a size regarded as dwarf. Compare "dwarf". rare.

  • 2Astronomy. A star which lies just below the main sequence on the Hertzsprung–Russell diagram, being less luminous than main sequence stars of the same temperature or spectral type.

Origin

Early 20th century; earliest use found in Bulletin Natal Department Agriculture. From sub- + dwarf.

Pronunciation

subdwarf

/ˈsʌbdwɔːf/