Glacian is a xenogender from the element system. It is a combination of the feminine element eluvian (water), and the neutral element tellusian (earth), and is represented by the element of ice. One whose gender element is a combination of feminine and neutral would be glacian.
History
Glacian was first known to be coined on January 14th, 2018, along with the flag[1], but it was likely coined earlier than that on a Google spreadsheet[2].
Flag
The flag's colors are blue and white, the colors of ice, with a diamond in the center, representing the eluvian and tellusian triangles stuck together.
Etymology
The word glacian comes from the Latin word glacies, meaning "ice"[3].