nyctitropic

American  

[nik-ti-trop-ik, -troh-pik] / ˌnɪk tɪˈtrɒp ɪk, -ˈtroʊ pɪk /

adjective

Botany.

1. tending to assume at or just before nightfall positions unlike those maintained during the day, as the leaves or flowers of certain plants.

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Other Word Forms

• nyctitropism
  noun

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Etymology

Origin of nyctitropic

First recorded in 1875–80; nycti- + -tropic

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Example Sentences

See Examples For:

nyctitropic

Amphicarpoea monoica: circumnutation and nyctitropic movement of leaf during 48 h.; its apex 9 inches from the vertical glass.

From The Power of Movement in Plants by Charles Darwin

In the next chapter it will be shown that the nyctitropic movements both of cotyledons and leaves consist of a modified form of circumnutation.

From The Power of Movement in Plants by Charles Darwin

Trifolium repens: circumnutation and nyctitropic movements of a nearly full-grown terminal leaflet, traced on a vertical glass from 7 A.M.

From The Power of Movement in Plants by Charles Darwin

Trifolium resupinatum: circumnutation and nyctitropic movements of the terminal leaflet during 24 hours.

From The Power of Movement in Plants by Charles Darwin

Passiflora gracilis: circumnutation and nyctitropic movement of leaf, traced on vertical glass, from 8.20 A.M.

From The Power of Movement in Plants by Charles Darwin

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