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extrorse

Syllabification: ex·trorse
Pronunciation: /ekˈstrôrs
 
, ˈekˌstrôrs
 
/

Definition of extrorse in English:

adjective

Botany & Zoology
1Turned outward. The opposite of introrse.
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.
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:

Origin

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

Derivatives

extrorsely

1
adverb
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.

Definition of extrorse in:

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