the GNU version of the Collaborative International Dictionary of English
adj. Having three dimensions; extended in three different directions.
The Century Dictionary and Cyclopedia
Having three (and only three) dimensionsāthat is, length, breadth, and thickness; of or relating to space so characterized.
Word Usage
"But I want to know if the same atmosphere acts as a capillary filter through which the working liquid (water) is transported or if it is a kind of tridimensional empty and filled parcels in the atmosphere (I mean low pressure-high pressure)."