planetoid etymology

English word planetoid comes from English planet, English -oid

Detailed word origin of planetoid

Dictionary entryLanguageDefinition
planet English (eng) (astronomy) A body which orbits the Sun directly and is massive enough to be in hydrostatic equilibrium (effectively meaning a spheroid) and to dominate its orbit; specifically, the eight major bodies of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. (Pluto was considered a planet until 2006 and has now been reclassified as a dwarf planet.) [from 17thc.]. (now, [...]
-oid English (eng) Of similar form to, but not the same as. Having the likeness of. Forms adjectives and nouns.
planetoid English (eng) (astronomy) A dwarf planet. (astronomy) A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna. (astronomy) An asteroid of any size. (astronomy) An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object.

Words with the same origin as planetoid

Descendants of -oid
alkaloid asteroid cannabinoid colloidal cycloid designoid factoid fibroid humanoid insectoid keloid mechanoid mong mongoloid monoid negro opioid paranoid roid schizoid solenoid sphenoid steroid trapezoid