Definition of substellar in English:

substellar

Syllabification: sub·stel·lar
Pronunciation: /ˈsəbˌstelər
 
/

adjective

Astronomy
  • Relating to or denoting a body much smaller than a typical star whose mass is not great enough to support main sequence hydrogen burning.
    More example sentences
    • Whereas some folks consider brown dwarfs the duds of the galaxy, astronomers see beauty in these substellar embers.
    • The mass fraction under the form of substellar objects in the halo of the Galaxy is likely to represent only 5 to 15% of the total dynamic mass.
    • We have completed the most extensive survey to date for low mass stellar and substellar companions to white dwarfs in the solar neighborhood.

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Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody