Definition of magnoliid in US English:

magnoliid

adjective

Botany
  • Of, relating to, or characteristic of the subclass Magnoliidae of dicotyledonous plants.

noun

Botany
  • A plant of the subclass Magnoliidae.

Origin

1980s. From scientific Latin Magnoliidae, subclass name from Magnolia, genus name + -idae.