English Dictionary

monad

/ˈmɒnæd/

noun

(philosophy) An ultimate atom, or simple, unextended point; something ultimate and indivisible. / (botany) A single individual (such as a pollen grain) that is free from others, not united in a group.

The concept of monad is central to Leibniz's philosophy.

意味（1）

(philosophy) An ultimate atom, or simple, unextended point; something ultimate and indivisible.

Hence Leibnitz, who looked upon things as noumena, after denying them everything like external relation, and therefore also composition or combination, declared that all substances, even the component parts of matter, were simple substances with powers of representation, in one word, monads.

意味（2）

(botany) A single individual (such as a pollen grain) that is free from others, not united in a group.

意味（3）

(biology, dated) A single-celled organism.

意味（4）

(category theory) A monoid object in the category of endofunctors of a fixed category.

Coordinate term: comonad

意味（5）

(functional programming) A data type which represents a specific form of computation, along with the operations "return" and "bind".

The properties that make the Maybe type a monad are its type constructor Maybe a, our chaining function (>>?), and the injector function Just.