Definition of polyhaploid in English:

polyhaploid

Pronunciation /ˌpɒlɪˈhaplɔɪd/

noun

Botany
  • A plant descended from polyploids that has half of the set of chromosomes that would normally be expected from its ancestry.

adjective

Botany
  • Of, relating to, or designating such a plant.

Origin

1930s.