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monad

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(mō′nad′, män′ad′)

noun

a unit; something simple and indivisible
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
Chem. a monovalent atom, element, or radical
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

of a monad or monads

Related Forms:

monadic adjective or monadical

See monad in American Heritage Dictionary 4

noun

Philosophy An indivisible, impenetrable unit of substance viewed as the basic constituent element of physical reality in the metaphysics of Leibniz.
Biology A single-celled microorganism, especially a flagellate protozoan of the genus Monas.
Chemistry An atom or a radical with valence 1.

Origin:

Origin: Latin monas, monad-, unit

Origin: , from Greek

Origin: , from monos, single; see men-⁴ in Indo-European roots

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Related Forms:

mo·nadˈic (mə-nădˈĭk), mo·nadˈi·cal adjective

mo·nadˈi·cal·ly adverb

moˈnad·ism noun

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