common measure

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A ballad stanza form in iambic meter, often rhyming in alternating pairs, that is typical of many church hymns.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the usual (iambic) meter of a ballad
• noun a time signature indicating four beats to the bar
• noun an integer that divides two (or more) other integers evenly