Wiktionary
n. A permanent wrinkle on the forehead.
Usage examples of "worry line".
Braden recognized the signs, though he could not think what to do about it, beyond bending down to kiss the slight worry line that he sometimes spied puckering her smooth forehead.
She wanted to smooth away the worry line that had formed between his brows.
She was still the same slender, dark-haired edition of her mother that she had been when she reached her final age, without an added ounce, worry line, or shift of body mass.
The dark gashes that were its mouths were filled with gray shadows, and even the new flaw that ran the length of the stone t and everyone said was a bad omen and a sign of the coming war looked like a deep worry line on the cheek of an old, old man.
A worry line appeared between her eyebrows, and she leaned forward and kissed him.
Snail was coming toward him, a small worry line carved between his eyebrows.