ˌad.əˈmisəd.ē, ˌatə-, -ətē, -i noun
( -es )
Etymology: International Scientific Vocabulary atomic + -ity
1.
a. : valence
b. : the number of atoms in the molecule of an element
c. : the number of replaceable atoms or groups in the molecule of a compound
2. : the state of consisting of atoms
3. philosophy : the nature, character, or property of being atomic