The state or quality of being complemental.

Of the nature of a complement; completing. / Complementary. / (obsolete) Additional; supplemental, accessory; ancillary.

plural of complementation

In a complemental manner

That can be complemented

plural of complementer

Something that serves as a complement to something else.

To complete, to bring to perfection, to make whole. / To provide what the partner lacks and lack what the partner provides, thus forming part of a whole.

(mathematics) The replacement of a set by its complement / (genetics) The interaction between two genetic units such that an organism can function normally if either one is defective

(linguistics) A subordinating conjunction that can convert a clause into a complement clause, i.e. one that completes a grammatical construction in the predicate and that describes or is identified with the subject or object.