The phrase "relatively incomplete" is correct and usable in written English.
It can be used to describe a part of a sentence that lacks necessary information or context, making it relatively less complete compared to other parts of the sentence. Example: The first half of her argument was relatively incomplete, lacking supporting evidence or examples to back up her claims.
But it has been relatively incomplete so far, wanting for that one signature figurine to make it whole.
Complicating this issue is the fact that toxicological databases for mycotoxins are relatively incomplete compared to other food contaminants.
We made some concessions regarding completeness (criterion 4), as, for instance, information on Argentinian and Brazilian athletes who participated in earlier editions is relatively incomplete.
And it was a relatively incomplete specimen, but it was one of these long-necked, heavy-bodied sauropod dinosaurs.
These results support the view that methylation of the Avy IAP is relatively incomplete even when it is silent.
The majority of rebbachisaurid finds to date, nevertheless, are relatively incomplete, especially with regard to the skull.
What seems to have happened is that Mr. Obama's caution, his reluctance to stake out a clearly partisan position, led him to propose a relatively weak, incomplete health care plan.
Agrypnia improba has a relatively pale, incomplete, medial frontoclypeal band.
This conclusion is also relatively insensitive to incomplete larval competitiveness or incomplete mortality, two likely imperfections in any real-world implementation of our proposed strategy (Fig. 3).
Also, the observed changes in streaming potential indicated that the adsorption tended to be relatively slow and incomplete under the conditions of analysis.
A lack of cryovolcanism would be consistent with geophysical inferences of a relatively quiescent interior: incomplete differentiation, only minor tidal heating, and possibly a lack of internal convection today.
