Conjugation /(?)/

Con·ju·ga·tion

Conjugation

n.
  1. the act of uniting or combining; union; assemblage. [Obs.]
    Mixtures and conjugations of atoms.
  2. Two things conjoined; a pair; a couple. [Obs.]
    The sixth conjugations or pair of nerves.
  3. The act of conjugating a verb or giving in order its various parts and inflections. (Gram.)
  4. A kind of sexual union; -- applied to a blending of the contents of two or more cells or individuals in some plants and lower animals, by which new spores or germs are developed. (Biol.)