Any process that stops, prevents, or reduces the frequency, rate or extent of the activation of the membrane attack complex components of the complement cascade.
Synonyms:
exact_synonym:
down regulation of activation of membrane attack complex; downregulation of activation of membrane attack complex; negative regulation of MAC assembly; negative regulation of MAC formation; negative regulation of activation of MAC; negative regulation of membrane attack complex assembly; negative regulation of membrane attack complex formation
narrow_synonym:
inhibition of activation of membrane attack complex; negative regulation of activation of TCC; negative regulation of activation of terminal complement complex; negative regulation of activation of the terminal complement cascade