substellar

adjective
sub·stel·lar | \ˌsəb-ˈste-lər \
variants: or sub-stellar

Definition of substellar 

of a celestial object

: having less mass than a star : not having the mass required to sustain nuclear fission Subsequent hunts within young stellar clusters have flushed out droves of brown dwarfs. Prime targets are the Pleiades cluster and star-forming regions in Orion and Taurus, where substellar bodies rival stars in number.— Robert Irion Very often, the most publicized events in astronomy involve the detection of fundamentally new types of objects. The discovery of a substellar object, a "brown dwarf" some dozens of times as massive as Jupiter, falls in this category.Physics Today

First Known Use of substellar

1949, in the meaning defined above

Keep scrolling for more

Learn More about substellar

Share substellar

Statistics for substellar

Look-up Popularity

Time Traveler for substellar

The first known use of substellar was in 1949

See more words from the same year

Comments on substellar

What made you want to look up substellar? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to reject or criticize sharply

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!