astroid

[ as-troid ]

noun

, Geometry.

1. a hypocycloid with four cusps.

astroid

/ ˈæstrɔɪd /

noun

1. maths a hypocycloid having four cusps

Word History and Origins

Origin of astroid¹

astr(o)- + -oid

Word History and Origins

Origin of astroid¹

C19: from astro- + -oid

Example Sentences

Apparently this would not work in real life; as Perkowitz explains, a group of physics students calcuated in 2002 that a hydrogen bomb would yield two astroid chunks that were a mere 1,200 feet apart, meaning the asteroid of "Armageddon" would still have struck Earth.

From Salon

That makes the discovery of an astroid belt orbiting the star Fomelhaut all the more exciting.

From Salon

Apparently this would not work in real life; as Perkowitz explains, a group of physics students calcuated in 2002 that a hydrogen bomb would yield two astroid chunks that were a mere 1,200 feet apart, meaning the asteroid of "Armageddon" would still have struck Earth.

From Salon

In other words, "cometary shrapnel" from a long-period comet which pinged around our solar system could have caused the impact that led to a mass extinction, rather than an astroid.

From Salon

The astroid itself is small, about 500 meters in diameter.

From Salon