diatropism

1. (biology) The growth or movement of a plant or animal in a direction perpendicular to a stimulus.Examples: "As a special result of diatropism, a transverse position is assumed which is exactly at right angles to the direction in which the iinfluence which acts as a stimulus is exerted."; "It is either positive, making the animal creep perpendicularly downward, or it causes a horizontal movement, (diatropism) at right angles to the axis of gravity, the result of which for the organism is the so-called maintenance of equilibrium."; "It is possible that in no other part of the world is the existence of a diatropism more beautifully exposed, that force that is manifested in various forms of the most visible consequence of which is to prevent the sea with coverag all the emergent lands. This diatropism has gradually caused the region of Baracoa to rise throughout very long periods of time and each new elevation has brought forth a new coastan fringe in the form of an extraordinary grade to the extent that it has become a stairway for giants that rises from the sea to nearly five hudred meters."countableuncountable

2. (organic chemistry) An orthogonal arrangement of groups of atoms within a molecule, often associated with aromaticity.Examples: "The phenomena of antiaromaticity and paratropism are less well known than those of aromaticity and diatropism."; "There can be two limiting variants of the structure of the nearest surroundings of a molecule: parallel pairs and a mutually orthogonal arrangement (paratropism and diatropism [22] respectively)."; "Conversely, the linearly fused ring has increased diatropism relative to 3 dues to the bond localization in the C ring."countableuncountable