Girl
Woman
noun
A woman child is just a girl!
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
そっちは女子トイレですよ。
The ladies' room is over there.
女子プロレスのチケットをプレゼントした。
I gave a women's professional wrestling ticket as a present.
女子バレーボールのチームキャプテンでした。
I was the captain of the women's volleyball team.