Definition of altitudinal in US English:

altitudinal

adjective

  • Relating to height above sea level or ground level.

    ‘altitudinal variations of terrain’

Pronunciation

altitudinal

/ˈaltəˌt(y)o͞od(ə)n(ə)l//ˈæltəˌt(j)ud(ə)n(ə)l/