Definition of extrorsely in US English:

extrorsely

adverb

Zoology Botany
  • See extrorse

    • ‘Anthers dehisce extrorsely 45–48 h after anthesis by which time the stigmas are completely dry.’
    • ‘In developing flowers the stamens are tightly appressed but soon mature centripetally and bend extrorsely at anthesis.’