tropho-, troph-, -trophy, -trophs, -trophically, -trophic, -trophous

A reference to organisms that obtain energy from oxidation/reduction reactions and use inorganic electron donors: A chemolithotrophic living thing obtains its vitality from the oxidation of inorganic substances.

Any organism that creates its principal energy source by oxidizing organic or inorganic compounds; A chemotroph acquires its vitality by the oxidation of electron-donating molecules in the environment.

Relating to or exhibiting chemotropism: Some chemotrophic organisms tend to move toward or away from a chemical stimulus.

The bending or movement of an organism, or part of an organism, in response to an outer chemical stimulus: Chemotropism is the growth or movement of a form of life in reaction to a chemical stimulus.

An inherited skeletal disorder beginning before birth where the cartilage is converted into bone resulting in dwarfism: Adam's chondrodystrophy is characterized by his abnormally short legs and arms; however, his head and body are essentially normal.

The enrichment of fresh or saline water by chemical nutrients that may overly increase the growth of aquatic plant life: Cultural eutrophication is caused by human activities, such as excessive use of chemical fertilizers or the contaminations of water by sewage effluents.

A thinning or wasting away of the skin: The elderly Mr. Green's skin was giving him problems, like bleeding easily, and Dr. Blue said he had a case of dermatrophia and to be sure not to bump or cut himself.

A wasting away or thinning of the skin: Like Mr. Green, Mrs. Black's skin was having the same issues, and her doctor, Mr. Smart, said that she had a condition of dermatrophy which was the same disorder like Mr. Green had.

Relating to, or showing, movement of the leaves of plants that follow the sun so they remain perpendicular to the sun's rays throughout the day: Sally's plants always displayed a diaheliotropic leaf position in order to get as much sunlight as possible.

A tendency of leaves, or other organs, of plants to have their outer surface facing towards sunlight: Jack noticed that the leaves of his plants always had their dorsal surface facing the sun, and he found out that this characteristic was termed diaheliotropism.

A tendency of leaves or other organs of plants to have their outer surfaces facing towards the rays of light.

A reference to the tendency of certain plants or their parts to arrange themselves at right angles or sideways to a stimulus.

1. The tendency of a plant or plant part to grow at right angles in response to an external stimulus such as light.
2. The tendency of some plant organs to take a transverse position (sideways or an an angle) to the line of action of an outside stimulus.

1. Affecting the conductivity of cardiac muscle; a reference to the influence of the chambered muscular organ nerves that pumps blood through the body.
2. Affecting the speed and conduction of nerve fibers: A positive dromotropic agent enhances the conduction of electrical impulses to the heart or the nerve fibers.

The quality or property of affecting the conductivity (control) of a nerve fiber.

• Negative dromotropism, the property of diminishing the conductivity of a nerve.
• Positive dromotropism, the property of increasing the conductivity of a nerve.