First Known Use: 1802
Dictionary
1asteroid
noun as·ter·oid \ˈas-tə-ˌrȯid\
: any one of thousands of small planets that circle around the sun
Full Definition of ASTEROID
1
: any of the small rocky celestial bodies found especially between the orbits of Mars and Jupiter
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Origin of ASTEROID
Greek asteroeidēs starlike, from aster-, astēr
Other Astronomy Terms
Rhymes with ASTEROID
adenoid, alkaloid, amoeboid, aneroid, anthropoid, arachnoid, Australoid, carcinoid, Caucasoid, celluloid, crystalloid, echinoid, ellipsoid, embryoid, eunuchoid, flavonoid, helicoid, hemorrhoid, hominoid, humanoid, hysteroid, metalloid, Mongoloid, myeloid, nautiloid, nucleoid, null and void, obovoid, opioid, osteoid, overjoyed, paranoid, planetoid, Polaroid, retinoid, rheumatoid, solenoid, Stalinoid, trapezoid, unalloyed, unemployed
2asteroid
adjective
Definition of ASTEROID
1
: resembling a star <asteroid bodies in sporotrichosis>
2
: of or resembling a starfish
First Known Use of ASTEROID
1854
ASTEROID Defined for Kids
asteroid
noun as·ter·oid \ˈa-stə-ˌrȯid\
Definition of ASTEROID for Kids
: one of thousands of rocky objects that move in orbits mostly between those of Mars and Jupiter and have diameters from a fraction of a mile to nearly 500 miles (800 kilometers)
Medical Dictionary
asteroid
adjective as·ter·oid \ˈas-tə-ˌrȯid\
Medical Definition of ASTEROID
: resembling a star
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