Definition of alimentiveness in English:

alimentiveness

noun

rare
  • The propensity to seek food or drink, specifically as one of the faculties assigned by phrenologists to a (supposed) specific organ; the organ itself.

Origin

Mid 19th century. Apparently from alimentive (although this is first attested slightly later) + -ness.

Pronunciation

alimentiveness

/ˌalɪˈmɛntɪvnɪs/