Z
- Zettai Ryōiki (絶対領域?)
- Meaning "Absolute Territory" (a term from the anime Neon Genesis Evangelion), this phrase refers to the area of exposed thigh when a girl is wearing a short skirt and thigh high socks. The 'ideal' skirt:thigh:sock above knee ratio is often reported to be 4:1:2.5. Zettai Ryōiki are often referred to by letter grades, where Grade A is the ideal and grade F is ankle socks, another grade, grade S, also exists consisting of Grade A in combination with ponytails and Tsundere personality.
Read more about this topic: Anime And Manga Terminology