The phrase "rough element" is correct and can be used in written English.
You can use it when you want to describe something as harsh or unpolished, or to refer to a specific component of something that is not smooth or refined. For example: "The rough element of the rock climbing wall made it an especially difficult challenge for the climbers."
It is brighter now, veterans say, and the rough element is gone.
It was a rough element of injustice on a wretched European night.
Mr. Rookard said that despite the neighborhood's hefty real estate prices and fancy boutiques, a rough element still descends on the weekends.
For EPMA analysis, we first screened areas of about 1.5 mm×1.5 maximummum covering centrilobular lesions or fibrosing lesion of interstitial lung diseases observed by pathological study to make rough element maps.
The sugar crystals act as the rough element to gently exfoliate.
Areas of roughness, or "rough" elements, were also another portion of the surface rupture that had high stress drop [i.e., the Schulz (2002) model of contact asperities].
Exposing Lear to the rough elements proves ruinous, in more ways than one.
What Web-surfing workers found online was something like the rough elements of a do-it-yourself newscast, complete with the frustrations of frequent technical problems and sometimes boring broadcasts of uneventful images.
The police at Birmingham were called upon, but before they arrived the local police and special constables were able to cope with the situation by baton charges, and drove the rough elements from the centre of the city.
Within asperity areas and within rough elements, the stress drop has higher values; and near the surface, it is constrained to diminish.
The 14 cm-high (H) scaled models of wind barriers were placed perpendicularly to the wind direction in the wind tunnel, and rough elements were placed upwind of the models to obtain a reasonable self-simulation zone and Reynolds number.
