1620s, from French adhésion or directly from Latin adhaesionem (nominative adhaesio) "a sticking to," noun of action from past participle stem of adhaerare (see adherent).
Adhesion is generally used in the material, and adherence in the metaphysical sense. [Johnson]
adhesion ad·he·sion (ād-hē'zhən)
A condition in which body tissues that are normally separate grow together.
A fibrous band of scar tissue that binds together normally separate anatomical structures.
The union of opposing surfaces of a wound, especially in healing. Also called conglutination.