the GNU version of the Collaborative International Dictionary of English
ad. To wit; that is; namely.
The Century Dictionary and Cyclopedia
An abbreviation of videlicet, usually read ‘namely.’
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. as follows
Word Usage
"Yglesias actually got to the point of posing a pertinent question at least, viz., is there “any kind of actual reason why Israel should continue expanding settlements,” where by “actual” I suppose he means “rational” or “reasonable.”"