پرلیکی porliki
*Fr.: porosité*
1) *General*: A → *dimensionless* number characterizing
a porous medium, expressed by the ratio of the volume occupied by the pores to
the total volume of the medium.
2) *Geology*: The percentage volume of hollow spaces in a rock, sediment, or soil.
3) *Dust grains*: The quantity usually defined as:
*P* = (*V*_{v}/*V*_{t}) = (1 -
*V*_{s}/*V*_{t}), where
*V*_{v} and *V*_{s} are the volumes of vacuum
and of the solid matter making up the particle, and
*V*_{t} is the total
volume of the particle within some defined surface. → *porous*; → *-ity*. |