What is the meaning of Xenia?

The concept of hospitality to strangers.

The effect that genes from pollen have on the endosperm.

A coral of the genus Xenia of photosynthetic soft marine corals with many-branched arms which pulse and push water around the coral.

plural of xenium

nominative/accusative/vocative plural of xenium

Xenien (biting epigram in the form of a two-line poem)

Source: wiktionary.org