Definition of nectosac in English:

nectosac

Pronunciation /ˈnɛktə(ʊ)sak/

noun

rare Zoology
  • The inner or undersurface of a nectophore.

Origin

Mid 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From necto- + sac.