noun
girl; baby girl
General term for a young female child, from infancy to early elementary school age. Often used in formal or written contexts, such as news reports or official documents.
See also: 男児
公園で女児が遊んでいた。
A girl was playing in the park.
女児向けのアニメが人気だ。
Anime for young girls is popular.
noun
schoolgirl; girl pupil
Specifically refers to a girl attending elementary school. The context usually makes the school setting clear.
女児たちがランドセルを背負って登校している。
The schoolgirls are going to school with their randoseru backpacks.