WordNet
n. a facial wrinkle associated with frowning
Usage examples of "frown line".
The tiny frown line came back between her eyes as she read my feelings.
A frown line ran down between her brows as she stepped closer to him.
She managed to close her lips, although it took a moment for her smile to slip back into place, and once again, the tiny frown line appeared.
His eyes took in her full appearance as she descended, the vertical frown line between his eyebrows prominently displayed.
Cindy nodded, and Jamie peered up at him, a little frown line between his eyebrows, as if he was trying to see something and having trouble doing so.
She caught my double take, and a frown line appeared between her eyebrows.
Reaching out carefully, Diana tweaked things, just a little, and was relieved to see a frown line reappear.
He frowned at the door, then shifted the look to Ganfrion, who met him, frown line for line.