An Etymological Dictionary of Astronomy and Astrophysics
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1) Pertaining to a class of objects with a mass less than 8 percent that of the Sun.
2) → substellar point.

→ sub- + → stellar.

The mass limit below which → hydrogen fusion cannot take place, and the cloud collapse cannot lead to the formation of a star. The limit is 0.075 → solar masses, corresponding to about 80 Jupiter masses.

→ substellar; → limit.

An object with a mass too small to sustain the → proton-proton chain and thus become a true star. See → brown dwarf.

→ substellar; → object.

The point on the Earth, or other body, at which a particular star is directly overhead at a given time.

→ substellar; → point.

The fact or condition, for an object, of not being capable to sustain the → hydrogen fusion because of its low mass (less than 0.08 → solar masses).

→ substellar + → -ity.