biosystematics noun. 
[,bʌɪǝ(ʊ)sɪstǝ'matɪks] M20.[from BIO- + systematics: see SYSTEMATIC noun 2.]Taxonomy based on the study of the genetic evolution of plant and animal populations.
 ■   biosystematic adjective of or pertaining to biosystematics 
M20. ■   biosystematically adverb M20. ■   biosy'stematist noun M20.  [TahlilGaran] English Dictionary ▲