the GNU version of the Collaborative International Dictionary of English
v. To draw towards a common center or a middle line.
The Century Dictionary and Cyclopedia
To draw on; induce; allure.
In physiology, to bring to or toward a median line or main axis. See adduction, 2.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. draw a limb towards the body
n. a compound formed by an addition reaction
Word Usage
"At that time Alex was studying the role of mono-ubiquitination of histones (for the histone-ubiquitin adduct H2A known also as protein A24 or uH2A, see above)."