conjugation

Concise Oxford English Dictionary © 2008 Oxford University Press:
conjugation /kɒndʒʊˈgeɪʃ(ə)n/

▶noun

• 1 Grammar the variation of the form of a verb, by which the voice, mood, tense, number, and person are identified.

  ■ the class in which a verb is put according to the manner of this variation.

• 2 Biology the temporary union of two bacteria or unicellular organisms for the exchange of genetic material.

  ■ the fusion of two gametes.

• 3 Chemistry the sharing of electron density between nearby multiple bonds in a molecule.

– derivatives
conjugational adjective.