Definition of longitudinarian in English:

longitudinarian

Pronunciation /ˌlɒŋɡɪˌtjuːdɪˈnɛːrɪən/ /ˌlɒŋɡɪˌtʃuːdɪˈnɛːrɪən/ /ˌlɒn(d)ʒɪˌtjuːdɪˈnɛːrɪən/

See synonyms for longitudinarian

noun

historical, rare
  • A person who seeks a method for determining terrestrial longitude.

adjective

  • Of or relating to terrestrial longitude or the means of determining it.

Origin

Late 17th century (in an earlier sense). From classical Latin longitūdin-, longitūdō longitude + -arian, after latitudinarian, latitudinarian.