Webster’s Revised Unabridged Dictionary · 1913
Disassimilative
Dis′as·sim′i·la·tive (·sĭm′ĭ·lā·tĭv), a. (Physiol.) Having power to disassimilate; of the nature of disassimilation.
Disassimilative processes constitute a marked feature in the life of animal cells. McKendrick.