Atoms of the same element that have different masses are called isotopes. Different masses result when there are different numbers of neutrons. All atoms of a particular element have the same number...
Definition of absent. 1 : not present at a usual or expected place : missing was absent from class today sharing memories of absent friends She was conspicously absent [=her absence was very noticeable] at the meeting. absently. adverb He replied absently to her question. Examples of absent in a sentence.
devoid. adjective (with of) lacking in, without, free from, wanting in, sans (archaic), bereft of, empty of, deficient in, denuded of, barren of I have never looked on a face so devoid of feeling. adjective.