"Yuri" redirect here. For the flower, see Lilium
The word yuri is based on the flower "Lily", and is a relatively common Japanese feminine name. Initially the term was used in many doujin circles for lesbian-pornographic theme, the meaning has since then drifted from its mostly pornographic connotation to describe the portrayal of intimate love, sex, or the intimate emotional connections between women.
Yuri works similarly to its counterpart where the aggressive persona dominates the opponent in an almost fanservice-y manner. In other words, the pairing is usually labelled with character who "attacks" first, followed by the character who "receives" (For example, an illustration HomuMado depicting Homura Akemi seducing Madoka Kaname). However, the difference may be thin and pairing order can be flexible.
While such genre has existed since the Taisei era, it is believed that the word "Yuri" is created by Bungaku Itou, the editor of Barazoku (薔薇族, lit. rose tribe), a magazine geared primarily towards gay men. He first used the term yurizoku (百合族, lit. lily tribe) in reference to female readers in the title of a column of letters called Yurizoku no heya (百合族の部屋, lit. lily tribe's room).
Since the Heisei era, works like Sailor Moon became the main topic for authors to create positive derivative Yuri stories, especially when Yuri stories were particularly tragic, possibly due to the society's negative reaction towards the genre.
Yuri on pixiv
Generally, it is advised to tag Yuri when the illustration clearly depicts both girls intimating with each other. Regardless of intent, there may be people who don't like relationship between same sexes, similar to Yaoi.
It is also advised that one should not simply tag everything with two (or more) girls in an illustration as Yuri. Doing so may cause discomfort and some may even get offended. Since different people may have different definitions of Yuri, illustrators may depict things differently.
Furthermore, please be aware that people may get offended over fan or forced couplings (e.g: pairing up both girls even if the show does not explicitly imply them at all). While every fan has their right in fantasizing such elements, it is also important to write adequate warnings before one submits an artwork surrounding this particular theme.
Bungaku Itou(Father of Yuri, who invented the term)
Sister and Loli
Yuri for World Peace
It's Not Yuri
※Other CP genres are excluded in this list.
Works that are frequently tagged with "Yuri"
※Mainly used for works that have heavy hints of Yuri
EL CAZADOR DE LA BRUJA
Summon Night: Swordcraft Story
Revolutionary Girl Utena
A Certain Scientific Railgun