The way I see it Finlayson has got it right.
It's one of the two...
You said something 'bout a D major chord without a fifth.
What your talking about there is a Dsus4 chord.
But I think thats unlikely to be it.
In sus4 chords the fourth usually replaces the third, not the
fifth like in the chord you described.
If you would like to explain the chord progression I'd might be
able to help you out to find which chord it is.
Much more easy to see, when in a context.