extrorse

[ek-strawrs, ek-strawrs]

adjective

Botany.

1. turned or facing outward, as anthers that open toward the perianth.

extrorse

/ ɛkˈstrɔːs /

adjective

1. botany turned or opening outwards or away from the axis

   extrorse anthers

extrorse

1. Facing outward, away from the central axis around which a flower is arranged. Used of anthers and the direction in which they open to release pollen.

Other Word Forms

• extrorsely adverb

Word History and Origins

Origin of extrorse¹

1855–60; < Late Latin extrorsus in outward direction, equivalent to extr ( a )- extra- + ( v ) orsus (adv.) turned

Word History and Origins

Origin of extrorse¹

C19: from Late Latin extrorsus in an outward direction, from Latin _extra- + versus turned towards

Example Sentences

Stamens much shorter, barely adherent to their base; anthers linear, much longer than the filaments, adnate and extrorse, but the long narrow cells opening laterally.

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Stamens 6–12, more or less united with the style; anthers adnate, extrorse.—Leaves petioled, mostly heart-shaped and entire.

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Anthers 2-celled, roundish-oval, blue, extrorse.

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Anthers heart-shaped or kidney-shaped, confluently 1-celled, shield-shaped after opening, extrorse.

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Rush-like herbs, with equitant leaves sheathing the base of a naked scape, which is terminated by a head of perfect 3-androus flowers, with extrorse anthers, glumaceous calyx, and a regular colored corolla; the 3-valved mostly 1-celled capsule containing several or many orthotropous seeds with a minute embryo at the apex of fleshy albumen.

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