What does adduction mean?
The definition of adduction
Ad*duc”tion, n.
Etym: [Cf. F. adduction. See Adduce.]

1 The act of adducing or bringing forward. An adduction of facts gathered from various quarters. I. Taylor.
2 (Physiol.)
The action by which the parts of the body are drawn towards its axis]; — opposed to abduction. Dunglison.