noun, noun which may take the genitive case particle 'no'
A-line (skirt, dress, coat)
Refers to a clothing silhouette that is fitted at the top and gradually widens toward the hem, resembling the letter A. Used as a noun or with の to modify another noun.
彼女はＡラインのスカートをはいている。
She is wearing an A-line skirt.
このワンピースはＡラインで、とても着やすい。
This dress is A-line and very comfortable to wear.