navelwort noun4 •Certain plants with features reminiscent of a human navel. •Umbilicus spp., especially Umbilicus rupestris, a European perennial succulent herb with round, peltate leaves with a central depression. •Omphalodes spp., with seeds reminiscent of a navel. •Marsh pennywort, herbs of genera Hydrocotyle or Centella. formsnavelworts