The phrase "a slender line" is correct and usable in written English.
It can be used to describe a thin or narrow line, often in a visual or metaphorical context.
Example: "The artist drew a slender line to separate the two contrasting colors on the canvas."
Alternatives: "a thin line" or "a narrow line".
In this research a distributed-mass impact damper, similar to the "chain damper" used in wind engineering, has been examined and applied to the vibration reduction on a slender line-like structural element (stay-cable).
If the National Guardsmen in their Army fatigues standing at the intersections of the avenues brought to mind images of Checkpoint Charlie, a cop lifting the slender line of yellow tape to allow card-carrying residents downtown was reminiscent of that more familiar form of New York exclusion: the velvet rope at the night-club door.
During a brief version of "Girls Dem Sugar," recorded in 2000 with Beenie Man and the Neptunes, a dance-hall reggae rhythm kept pace with a slender guitar line and Mya's breathy vocals.
Surely I can't be the only person freaked when, on the other side of a slender yellow line dividing a road, someone ill-equipped to drive -- me, for example -- is operating tons of machinery that can, with one skid, maim or squash them.
Catholic Home & Garden say: "There's no doubt that we are now living in a world that has gone mad - but this crosses whatever slender line of decency was left in the world of Halloween costumes.
There were no trends, except for long, slender lines — just a beautiful collection that had a young, fresh elegance.
On a highly superficial level, it is possible to discuss the implications of using brushed aluminum and long, slender lines to illustrate a sense of futurism and references to technology in architecture.
From an aesthetic point of view, they spoiled the slender lines of one of the most beautiful bridges in New York.
A contrast has also been used between the grandstands' slender lines and the coarse finish of the cavern rock.
