Definition of orthograde in US English:

orthograde

adjective

Zoology
  • Of a primate: holding the body upright; (of posture) erect. Contrasted with pronograde.

Origin

Early 20th century; earliest use found in Arthur Keith (1866–1955), museum curator and palaeoanthropologist. From ortho- + -grade Compare pronograde.

Pronunciation

orthograde

/ˈɔːθə(ʊ)ɡreɪd/