self-activating self-activating /sɛlf ˈæktɪˌveɪtɪŋ/

adjective

1. Designed to activate, move or regulate itself  ( self-acting , self-activating , self-moving , self-regulating )
   designed to activate, move or regulate itself
    A self-activating sprinkler system
   a self-activating sprinkler system