sys·​tem·​at·​ics | \ˌsi-stə-ˈma-tiks \

Definition of systematics 

1 : the science of classification

2a : a system of classification

b : the classification and study of organisms with regard to their natural relationships : taxonomy

First Known Use of systematics

1879, in the meaning defined at sense 1

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The first known use of systematics was in 1879

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sys·​tem·​at·​ics | \ˌsis-tə-ˈmat-iks \

Medical Definition of systematics 

1 : the science of classification

2a : a system of classification

b : the classification and study of organisms with regard to their natural relationships : taxonomy

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