Definition of diplontic in English:



  • (of an alga or other lower plant) having a life cycle in which the main form, except for the gametes, is diploid.

    Compare with haplontic and diplohaplontic

    ‘Most brown algae undergo an alternation of generations life cycle, as does Ulva, but species such as Fucus reproduce via a diplontic life cycle, meaning the adult is the sporophyte and diploid.’
    • ‘The diplontic life cycle is not seen in algae or plants.’
    • ‘Unfortunately, current knowledge on architecture and programming of shoot meristem was not used in this explanation to support genetic results against diplontic selection.’
    • ‘The chromosome changes seen in meristems 2-3 cell cycles after treatment provide a basis for diplontic selection; for the establishment of a new meristem from, perhaps, a few initial cells.’
    • ‘Members of the order Fucales have a true diplontic life history.’



/ˌdipˈlän(t)ik/ /ˌdɪpˈlɑn(t)ɪk/


1920s from diplo-‘double’ + Greek on, ont- ‘being’ (from einai ‘be, exist’) + -ic.