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plan′e·toi′dal (-toid′l) adj.


(Celestial Objects) another name for asteroid1
ˌplaneˈtoidal adj


(ˈæs təˌrɔɪd)

1. any of the thousands of small, solid bodies that revolve about the sun in orbits largely between Mars and Jupiter.
2. starlike.
[1795–1805; < Greek asteroeidḗs starry, starlike. See aster, -oid]
as`ter•oi′dal, adj.


Astronomy. any of thousands of small celestial bodies that revolve about the sun in orbits chiefly between those of Mars and Jupiter ranging in diameter from one mile to 480 miles. Also called asteroids, minor planets. — planetoidal, adj.
See also: Planets
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.planetoid - any of numerous small celestial bodies that move around the sunplanetoid - any of numerous small celestial bodies that move around the sun
asteroid - any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)
celestial body, heavenly body - natural objects visible in the sky
KBO, Kuiper belt object - any of many minor planets in the Kuiper belt outside the orbit of Neptune at the edge of the solar system
solar system - the sun with the celestial bodies that revolve around it in its gravitational field


n (Astron) → Planetoid m
References in periodicals archive ?
In this paper we will show, that the connection between the body mass distribution and the distribution of orbital periods of planets and largest planetoids in the solar system can be described by the scaling law (1):
We might also call ourselves planets or planetoids, ones on which most of our continents have yet to be discovered--we're held back in part by whatever external circumstances are operating, but we actively check the process as well by closing our inner eyes to ourselves, for we're afraid of nothing so much as of ourselves and of anything inside us that is unknown and remains unknown, which may be why we're so very afraid of one another, too.
It is more widely distributed in dusts, sands, planetoids and planets as various forms of silicon dioxide (silica) or silicates.
Washington, Oct 6 (ANI): Challenging popular theory about how part of our solar system formed, a University of Victoria PhD student has found evidence that the planet Neptune can't have knocked a collection of planetoids known as the Cold Classical Kuiper Belt to its current location at the edge of the solar system.
Gone are the mind-bending 3D jaunts across spherical planetoids, replaced instead with glorious 2D visuals which bring back memories of the Super Nintendo launch title Super Mario World.
When a professional space explorer finds, by chance, the star Caravella which features a dozen planetoids, ore bearing space rocks, and an Earth-sized world of oceans and continents making it especially attractive to human settlement, he intends to return home to sell his discovery, but dies in a mishap.
Everything dies--/poppies, antelope, dinosaurs,/mountain peaks, planetoids, black holes--/even the universe may die.
If Sedna is part of the Oort Cloud [a so-far undetected cloud of asteroids and planetoids thought to exist hundreds of billions of miles from the sun], then what we used to think of as being inconceivably far away is actually on our doorstep," he says.
The region beyond the realm of the nine planets might be home to many more planetoids - a smaller and closer one, called Quaoar, was discovered two years ago.
It's for projects involving the solar system, doing supernova research, searching for planetoids and measuring moon craters,'' said Jeremy Amarant, the district's planetarium director.