Definition of pentamerous in US English:



Zoology Botany
  • 1Having parts arranged in groups of five.

    • ‘These species are notable for the plesiomorphic retention of venation (albeit already quite reduced) in their tegmina, segmented cerci, and pentamerous tarsi.’
    • ‘The zygomorphic, pentamerous and spurred flowers are approximately 15 x 12 mm in diameter.’
    • ‘The large number of strictly pentamerous families of starfish support the interpretation that there is ‘rigid control’ of pentamerism.’
    • ‘He expressed the possibility that the pentamerous condition of the water vascular system might be ‘rigidly programmed into the developmental process.’’
    • ‘Most basal Eudicots are dimerous or trimerous, with only occasionally pentamerous types (Sabiaceae, Ranunculaceae) which represent homoplasious trends.’
    1. 1.1 Consisting of five joints or parts.
      Compare with pentameral