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.
Full Definition of ABSENTEEISM. 1. : prolonged absence of an owner from his or her property. 2. : chronic absence (as from work or school); also: the rate of such absence. See absenteeism defined for English-language learners.ADVERTISEMENT.ull Definition of ABSENTEEISM. 1. : prolonged absence of an owner from his or her property. 2. : chronic absence (as from work or school); also: the rate of such absence. See absenteeism defined for English-language learners. ADVERTISEMENT.