Definition of extrorse in English:


Syllabification: ex·trorse
Pronunciation: /ˈekˌstrôrs


Botany & Zoology
  • 1Turned outward. The opposite of introrse.
    More example sentences
    • These pitchers are extrorse (face outward), and according to habitat can be red, green, yellow, or orange, and are as long as 21 cm.
    • These pollen sacs can face outward, in which case the stamens are called extrorse (eg, Ranunculaceae), or inward, in which case the stamens are called introrse.
  • 1.1(Of anthers) releasing their pollen on the outside of the flower.
    More example sentences
    • Anthers are juxtaposed, included in the corolla, extrorse and open longitudinally.
    • Extrorse anthers are somewhat concentrated in primitive dicots and primitive monocots and are rare in more advanced groups.
    • On the other hand, there is a correlation between extrorse anthers and short filaments:



More example sentences
  • 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.


mid 19th century: from late Latin extrorsus 'outward'(adverb).

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