monadic

noun

1. a unit; something simple and indivisible
2. Biol.
   1. any simple, single-celled organism, specif., a simple type of flagellated protozoan or protist
   2. any of the four nuclei formed at the completion of meiosis
3. Chem. a monovalent atom, element, or radical
4. Philos. an entity or elementary being thought of as a microcosm or ultimate unit

Origin: LL monas (gen. monadis) < Gr monas (gen. monados), a unit, unity < monos, alone: see mono-

adjective