Noun
(physics) a particle that is less complex than an atom; regarded as constituents of all matter
Source: WordNetNow, because of all these considerations, Rutherford decided that a hydrogen nucleus was possibly a fundamental building block of all nuclei, and also possibly a new fundamental particle as well, since nothing was known from the nucleus that was lighter. Source: Internet
Protons were therefore a candidate to be a fundamental particle and a building block of nitrogen and all other heavier atomic nuclei. Source: Internet
The holographic principle thus implies that the subdivisions must stop at some level, and that the fundamental particle is a bit (1 or 0) of information. Source: Internet