Definition of "astroid" []

• A hypocycloid with four cusps. (noun)

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• "I have been watching over the last week the arguments of the various camps of keeping the moon option, going directly to Mars, go to an NEO astroid, and several others."
• "The other group would have two missions; one would be to explore the stars via telescopes and other devices while the other would develop plans to explore (and settle) other planets, the Moon and the astroid field with robotic, satelite and human exploration."
• "He should have instantly put on his ObamaSuit, flown up to the astroid belt, grabbed a small astroid, dived down to the bottom of the gulf, and the stuck the astroid into the well."