atomic

Từ điển Oxford Advanced Learner 8th

atom·ic BrE [əˈtɒmɪk] NAmE [əˈtɑːmɪk] adjective usually before noun
1. connected with atoms or an atom
•atomic structure
2. related to the energy that is produced when atoms are split; related to weapons that use this energy
•atomic energy/power
•the atomic bomb
•the post-war atomic programme

Word Origin:
[atomic] late 17th cent.: from modern Latin atomicus, from atomus ‘indivisible’ from Greek atomos, based on a- ‘not’ temnein ‘to cut’.