areal

alueellinen Of or pertaining to an area.

areal interstices — the areas or spaces inclosed by the reticulate vessels of leaves

Areal density is often used as a technology growth-rate indicator for the hard disk drive industry. Areal density is defined as the product of the linear bits per inch (bpil, measured along the length of the tracks around the disk, multiplied by the number of tracks per inch (tpi), measured radially on the disk (see Figure 9.1).

It should be clear then, that BMDBone Mineral Density measurements with DXADual-energy X-ray Absorptiometry are two-dimensional or areal measurements, whereas BMD measurements with QCTQuantitative Computed Tomography are three-dimensional or volumetric. Because DXA measurements are areal, bone size can affect the apparent BMD.

The areal sweep efficiency EA is defined as the fraction of the total flood pattern that is contacted by the displacing fluid.