Of'fice of Civ'il and Defense' Mobiliza"tion
the former division (1958–61) of the Executive Office of the President that administered all federal programs dealing with the defense by civilians of their homes, families, communities, etc., in the event of enemy attack. Abbr.: OCDM
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.