What does 女孩子 (nǚ hái zǐ) mean in English?

Card 15IC2 Level 215/37
CARD15
PROGRESS41%
女孩子
nǚ hái zǐ
girl

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d