(astronomy) any of the small solid extraterrestrial bodies that hits the earth's atmosphere
同义词：meteor
meteoroid详细解释
me.te.or.oid n.（名词）A solid body, moving in space, that is smaller than an asteroid and at least as large as a speck of dust.流星体：活动在空间的固体天体，比小行星小，至少与尘埃一样大
