apogeotropism

American  

[ap-uh-jee-o-truh-piz-uhm] / ˌæp ə dʒiˈɒ trəˌpɪz əm /

noun

Biology.

1. growth or orientation away from the earth; negative geotropism.

---

apogeotropism British  

/ ˌæpəˌdʒɪəˈtrɒpɪk, ˌæpədʒɪˈɒtrəˌpɪzəm /

noun

1. negative geotropism, as shown by plant stems

---

Other Word Forms

• apogeotropic adjective
• apogeotropically adverb

Etymology

Origin of apogeotropism

First recorded in 1875–80; apo- + geotropism

Example Sentences

Here then we have a good opportunity for observing how apogeotropism acts when very nearly balanced by an opposing force.

From The Power of Movement in Plants by Darwin, Charles

The sheath-like cotyledons of Phalaris Canariensis are extremely sensitive to apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

With respect to apogeotropism, De Vries maintains that it generally comes into play, and of this fact we shall presently advance some indirect evidence.

From The Power of Movement in Plants by Darwin, Charles

Except when already standing vertically upwards, both legs of the arch are acted on from the earliest period by apogeotropism.

From The Power of Movement in Plants by Darwin, Charles

The after-effects of apogeotropism last for above half an hour; and horizontally-laid hypocotyls are sometimes thus carried temporarily beyond an upright position.

From The Power of Movement in Plants by Darwin, Charles