The pleura is a membrane that surrounds the lungs of mammals. Presumably, the phrase means that the surface of the pleura was found to be normal in an examination.
There is no such expression. The normal to a surface, at a given point is the radius of curvature of the surface, at that point.
The normal vector to the surface is a radius at the point of interest.
A curved surface area can be described as one where the gradient of the normal to the surface changes smoothly from point to point.
Matte proof coins are special proofs that have a grainy "sandblasted" look on the surface. Matte proof coins were sometimes made in the early part of the 1900's. Normal proof coins have a mirror like brilliant surface.
The mean of a standard normal distribution is 0.
Pleural-based opacity refers to opacity seen in X-rays along the pleural surface. The opacity or silhouettes can mean many things like signs of injuries, possible thickening, or indications of disease.
pleural rub
The [mucosal] Pleural membrane.
Normal findings indicate no evidence of any pathologic or disease conditions.
surface tension.
It covers the surface of the thorasic cavity and separates the medinastinum from the pleural cavity
The pleural effusion is any abnormal amount of fluid all around the lungs. It can result to varying types of medical conditions.
Pleural refers to the pleura or membrane that enfolds the lungs
Normal to the surface is a vector which is perpendicular to that surface
what is pleural thickening
Surface tension from pleural fluid, positive pressure, and atmospheric pressure on the thorax.
bronchopleural