of a mathematical function, taking one argument, cf polyadic [adj]
a. any simple, single-celled organism b. any of various small, flagellate, colorless ameboids with one to three flagella, esp. of the genus Monas
element, atom, or group having a valence of one
a. (in the metaphysics of Leibniz) an unextended, indivisible, and indestructible entity that is the basic or ultimate constituent of the universe and a microcosm of it b. (in the philosophy of Giordano Bruno) a basic and irreducible metaphy