I am wondering if I can use 'whereas' as a conjunction between a main and a subordinate clause, with the subordinate clause following and giving a reason supporting the statement in the main clause. For example:
As a model system we consider a mutant zombie hoard, whereas the vast majority of zombie hoards fall into this category.
I realize that there is another use of 'whereas' to contrast two things; it's the third entry in the OED Online:
3. Introducing a statement of fact in contrast or opposition to that expressed by the principal clause: While on the contrary; the fact on the other hand being that. (The principal clause usually precedes, but sometimes follows as in 2.)
That's not what I mean. What I want is the second entry in the OED:
2. In view or consideration of the fact that; seeing that, considering that, forasmuch as, inasmuch as. (Chiefly, now only, introducing a preamble or recital in a legal or other formal document.)
However, in the OED, all of the examples for case '2' have 'whereas' at the beginning of the sentence, not in the middle. So, is it valid English to write "As a model system..." as above, or not?