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

Any organism that creates its principal energy source by oxidizing organic or inorganic compounds.

Relating to or exhibiting chemotropism; tending 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.

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.

A wasting away or thinning of the skin.

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.

A tendency of leaves, or other organs, of plants to have their outer surface facing towards sunlight.

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.

1. In medicine, a referring to a condition caused by dystrophy or the progressive changes that may result from defective nutrition of a tissue or organ.
2. Relates to or is caused by faulty nutrition.
3. In ecology, with reference to a lake or pond, having too low an accumulation of dissolved nutrients to support abundant plant life.
4. Another description of a lake or pond that contains highly acid, brownish waters filled with undecayed plant materials, and eventually developing into a peat bog or marsh.
5. Refers to a lake with high humus material, sparse bottom fauna, and low dissolved oxygen.