Definition of nyctinastic in English:

nyctinastic

adjective ˌnɪktɪˈnastɪkˌniktəˈnastik

Botany

(of the periodic movement of flowers or leaves) caused by nightly changes in light intensity or temperature.
Example sentencesExamples
- Leaflets of nyctinastic plants assume a vertical (i.e. closed) position in darkness and revert to horizontal orientation upon illumination.
- Leaf-movement in nyctinastic plants has long been believed to be controlled by plant hormones that are common among all nyctinastic plants.
- Several systems of measurement have been used to characterize leaf or leaflet orientation during nyctinastic and heliotropic movement.

Derivatives

nyctinasty

noun ˈnɪktɪˌnasti

Botany

The trifoliate leaflets are closed as in nyctinasty.
Example sentencesExamples
- What is the selective advantage to plants of nyctinasty (sleep movements) which closes flowers in the evening?
- Many plants growing in areas of high rainfall, use circadian plant leaf movement, or nyctinasty, to change their leaves' angles in relation to the vertical and to facilitate their opening and closing.
- We found that nyctinasty is controlled by a periodic change of the internal concentration of leaf-opening and leaf-closing substances in the plant body.

Origin

Early 20th century: from Greek nux, nukt- 'night' + nastos 'pressed' + -ic.

Definition of nyctinastic in US English:

nyctinastic

adjectiveˌniktəˈnastik

Botany

(of the periodic movement of flowers or leaves) caused by nightly changes in light intensity or temperature.
Example sentencesExamples
- Leaf-movement in nyctinastic plants has long been believed to be controlled by plant hormones that are common among all nyctinastic plants.
- Several systems of measurement have been used to characterize leaf or leaflet orientation during nyctinastic and heliotropic movement.
- Leaflets of nyctinastic plants assume a vertical (i.e. closed) position in darkness and revert to horizontal orientation upon illumination.

Origin

Early 20th century: from Greek nux, nukt- ‘night’ + nastos ‘pressed’ + -ic.

单词	nyctinastic
释义	Definition of nyctinastic in English: nyctinastic adjective ˌnɪktɪˈnastɪkˌniktəˈnastik Botany (of the periodic movement of flowers or leaves) caused by nightly changes in light intensity or temperature. Example sentencesExamples Leaflets of nyctinastic plants assume a vertical (i.e. closed) position in darkness and revert to horizontal orientation upon illumination. Leaf-movement in nyctinastic plants has long been believed to be controlled by plant hormones that are common among all nyctinastic plants. Several systems of measurement have been used to characterize leaf or leaflet orientation during nyctinastic and heliotropic movement. Derivatives nyctinasty noun ˈnɪktɪˌnasti Botany The trifoliate leaflets are closed as in nyctinasty. Example sentencesExamples What is the selective advantage to plants of nyctinasty (sleep movements) which closes flowers in the evening? Many plants growing in areas of high rainfall, use circadian plant leaf movement, or nyctinasty, to change their leaves' angles in relation to the vertical and to facilitate their opening and closing. We found that nyctinasty is controlled by a periodic change of the internal concentration of leaf-opening and leaf-closing substances in the plant body. Origin Early 20th century: from Greek nux, nukt- 'night' + nastos 'pressed' + -ic. Definition of nyctinastic in US English: nyctinastic adjectiveˌniktəˈnastik Botany (of the periodic movement of flowers or leaves) caused by nightly changes in light intensity or temperature. Example sentencesExamples Leaf-movement in nyctinastic plants has long been believed to be controlled by plant hormones that are common among all nyctinastic plants. Several systems of measurement have been used to characterize leaf or leaflet orientation during nyctinastic and heliotropic movement. Leaflets of nyctinastic plants assume a vertical (i.e. closed) position in darkness and revert to horizontal orientation upon illumination. Origin Early 20th century: from Greek nux, nukt- ‘night’ + nastos ‘pressed’ + -ic.
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