| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Elementary Particles | Health | Individual components of atoms, usually subatomic; subnuclear particles are usually detected only when the atomic nucleus decays and then only transiently, as most of them are unstable, often yielding pure energy without substance, i.e., radiation. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
