Paired together.

In chemistry, this refers to an acid and a base which can convert to each other by the gain or loss of a proton (a hydrogen nucleus), which together are called a conjugate acid-base pair. It can also refer to two liquids in equilibrium with each other.

In mycology (the study of fungi), this refers to a dikaryon with two haploid nuclei in it.

(09 Oct 1997)