Definition of Palaeophytic in US English:

Palaeophytic

(also palaeophytic, paleophytic)

adjective

  • Originally: designating a division of geological time during which land plants evolved and lower vascular plants (ferns, horsetails, cycads, etc.) became dominant. Now also: designating or relating to the type of plant or vegetation characteristic of this time (though overlapping in occurrence with the later Mesophytic flora).

noun

  • Chiefly with the. The Palaeophytic era.

Origin

Late 19th century; earliest use found in Popular Science Monthly. From French paléophytique from paléo- + phyt- + -ique, after paléozoïque.