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Modification of the direction of growth.

The property of existing in two or more conditions which are distinct in their physical or chemical relations.

The habit of bending from the sunlight; -- said of certain plants.

The apogeotropic tendency of some leaves, and other parts.

A condition of the system produced by long use of belladonna.

The tendency of plant organs to grow in a straight line when uninfluenced by external stimuli.

The tendency of organs (as roots) of plants to assume a position oblique or transverse to a direction towards the center of the earth.

A tendency of leaves or other organs of plants to have their dorsal surface faced towards the rays of light.

The tendency of a root to place its axis in the line of a galvanic current.

A disposition to turn or incline towards the earth; the influence of gravity in determining the direction of growth of an organ.

The phenomenon of turning toward the light, seen in many leaves and flowers.

A tendency towards moisture.

Isotropy.

The tendency of certain plant organs, as leaves, to assume special "sleeping" positions or make curvatures under the influence of darkness. It is well illustrated in the leaflets of clover and other leguminous plants.

nder the influence of light. In ordinary use the term is practically synonymous with heliotropism.

A directive influence exercised by a mass of matter upon growing organs. Encyc. Brit.

The phenomenon of turning towards a source of warmth, seen in the growing parts of some plants.

Of or pertaining to allotropism. -- Al`lo*trop"ic*al*ly, adv. Allotropic state, the several conditions which occur in a case of allotropism.

Relating to, or exhibiting, diageotropism.

Relating or, or manifesting, diaheliotropism.