Ambix is a term to describe a gender that is ambiguous but not androgynous; being amingender and not lingender.
History
Ambix was coined by Tumblr user variant-archive, April 25th, 2021, alongside it counterpart, angix (a gender that is androgynous but not ambiguous).[1]
The coiner commented, in reference to the term: "I’m ambix! There’s a common misconception that ambiguity and androgyny are the same thing or interchangeable, but they are two distinct gender qualities. Androgyny is midbinary in nature, deriving from masculinity and femininity and/or related to those concepts. Ambiguity isn’t related to the binary and is cryptic and enigmatic, having multiple interpretations, not clearly being one thing or another. When both qualities are present it may be described as ambiguinity. When you’re one and not the other it can be a bit frustrating to see them being mixed up and having your gender misinterpreted, but this is a term to help prevent that and make it clear what quality your gender is related to. When I say my gender is ambiguous it is in a very abinary way."
Flag
The ambix flag was created by Tumblr user variant-archive, on April 25th, 2021.
The flag's creator commented, in reference to the flag: "The flag colors are partially based on commonly associated colors and partially on visual metaphor; [...] the ambix flag has less contrast [than it's counterpart, the angix flag,] and has colors that are a bit harder to discern the name of if one were to describe them, and different people might describe the colors differently."