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

/ ĕk′strôrs′ /

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 Words From

• ex·trorsely 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 3, opposite the outer lobes of the corolla-like perianth; anthers extrorse.

From Project Gutenberg

Stamens 6–12, more or less united with the style; anthers adnate, extrorse.

From Project Gutenberg

Filaments thread-like, much longer than the linear-oblong blunt anthers, which are fixed by a point above the base and extrorse.

From Project Gutenberg

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

From Project Gutenberg

Sometimes, from their versatile nature, anthers originally introrse become extrorse, as in the Passion-flower and Oxalis.

From Project Gutenberg