类冥天体、类冥矮行星或冥王星型天体（plutoid）指海王星外天体中的矮行星。

国际天文联合会延续扩展2006年行星重定义目录中的天体，在2008年6月11日于挪威首都奥斯陆定义了类冥矮行星：

相应的，类冥矮行星可以被视为是矮行星和海王星外天体的交集。在2008年，冥王星、阋神星、鸟神星和妊神星是仅有的类冥矮行星，但还有多达42个天体可能会被纳入此一分类中。

A plutoid or ice dwarf is a trans-Neptunian dwarf planet, i.e. a body orbiting beyond Neptune that is massive enough to be rounded in shape. The term plutoid was adopted by the International Astronomical Union (IAU) working group Committee on Small Bodies Nomenclature, but was rejected by the IAU working group Planetary System Nomenclature. The term plutoid is not widely used by astronomers, though ice dwarf is not uncommon.