monad medical definition

1. An atom or a radical with a valence of 1.
2. A single-celled microorganism, especially a protozoan of the genus Monas.
3. Any of the four chromatids of a tetrad that, after the first and second meiotic divisions, separate to become the chromosomal material in each of the four daughter cells.

Related Forms:

• monadic , mo·nadˈi·cal adjective