Definition of phyletics in US English:

phyletics

noun

Biology
  • The study of the relationships between biological species or other groups of organisms as resulting from evolutionary change and divergence; specifically an approach to systematics which aims to classify organisms on the basis of evolutionary relationships (contrasted with phenetics), but does not apply the strict principles of cladistics.

Origin

1930s; earliest use found in American Midland Naturalist. From phyletic: see -ic.

Pronunciation

phyletics

/fʌɪˈlɛtɪks/