Definition of monophyletism in US English:

monophyletism

noun

Biology
  • = monophyly.

Origin

Early 20th century. From mono- + phyletism, after monophyletic.

Pronunciation

monophyletism

/ˌmɒnə(ʊ)ˈfʌɪlɪtɪz(ə)m/