- penetrabilities
- pen·e·tra·bil·i·ty || ‚penɪtrə'bɪlətɪ n. ability to be penetrated, permeability, ability to be entered
English contemporary dictionary. 2014.
English contemporary dictionary. 2014.
radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… … Universalium