Source : Webster's Revised Unabridged Dictionary (1913)

Subalternate \Sub`al*ter"nate\, a.
   1. Succeeding by turns; successive.

   2. Subordinate; subaltern; inferior.

            All their subalternate and several kinds. --Evelyn.

Subalternate \Sub`al*ter"nate\, n. (Logic)
   A particular proposition, as opposed to a universal one. See
   {Subaltern}, 2.