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Wiktionary
ovoo

n. A shamanistic cairn found in Mongolia, usually made from rocks or wood and found on or around mountains.

Wikipedia
Ovoo

Ovoo or obo (, Traditional Mongol: , "heap"; Chinese: 敖包 áobāo, lit. "magnificent bundle [i.e. shrine]") are sacred stone heaps used as altars or shrines in Mongolian folk religious practice and in the religion of other Mongolic peoples. They are usually made from rocks with wood.

Ovoos are often found at the top of mountains and in high places, like mountain passes. In modern times, especially in China, some of them have developed into large and elaborate structures becoming more like temples than simple altars. In many of these aobaoes of China, a trident symbol is put on top of the structure.

They serve mainly as sites for the worship of Heaven and lesser gods led by shamans and kins' elders, but also for Buddhist ceremonies.

Ovoo (genus)

Ovoo gurvel is an extinct monitor lizard from the Late Cretaceous of Mongolia. It is one of the smallest and earliest monitor lizards. It was described in 2008. Ovoo possesses a pair of two small bones in its skull that are not seen in any other lizard.