/ sɪˈstemɪk; NAmE ; sɪˈstiːmɪk/ adjective ( technical )
1.
affecting or connected with the whole of sth, especially the human body
2.
systemic chemicals or drugs that are used to treat diseases in plants or animals enter the body of the plant or animal and spread to all parts of it :
systemic weedkillers
► sys·tem·ic·al·ly adverb
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WORD ORIGIN
early 19th cent.: formed irregularly from system + -ic .