After a bit more research, I think I found what the OT was talking about - Ideational Praxis/Dyspraxia/Apraxia. I learned from a friend who has a child with speech apraxia that, at least in the state of NC, they can't be officially diagnosed with this type of thing until they are 3 years old, so that may be why she didn't use the dyspraxia/apraxia terms.
I've decided I'm going to hold off on further research until we meet with DD's therapist again Wed. so as not to research the wrong thing and get too upset. It sounds kind of scary to me.
