Definition of macrophylum in US English:

macrophylum

(also macro-phylum)

noun

  • A grouping of languages of a higher order than a phylum, i.e. including languages believed to be less closely related than those of one phylum.

Origin

1950s.

Pronunciation

macrophylum

/ˌmakrə(ʊ)ˈfʌɪləm/