chemo-, chem-, chemico-, chemi-, -chemist, -chemic, -chemical +

An obsolete treatment of disease with a combination of drugs and serum.

Chemical action taking place through an intervening semipermeable membrane.

The portion of the earth's atmosphere, 30-80 km above the surface, where chemical (especially photochemical) activity is most intense. It encompasses the stratosphere, the mesophere, and possibly a part of the thermosphere.

A device that permits cultivation of microbes under constant conditions by providing inflow of medium and outflow of culture at the same rate, the density of the growth being set by some limiting nutrient.

A chemical that is used to control insect plant pests by precluding their reproduction without affecting their life span or mating behaviors.

Reproductive sterilization of noxious pests, especially insects, by chemical means.

1. The use of inorganic substances such as carbon dioxide to synthesize carbohydrates from energy released by chemical reactions rather than by absorbed light.
2. The synthesis of organic compounds using chemical energy derived from the oxidation of simple inorganic substrates.

Of or relating to chemotaxis.

Any substance that facilitates the formation of an agent that is chemotactic for cells.

1. In biology, the movement of a cell or organism toward or away from a chemical substance.
2. In immunology, the movement of granulocytes or macrophages to higher concentrations of agents known as cytotaxins.
3. Response of living cells or free-swimming micro-organisms to chemical substances in solution.

Someone who specializes in the process and methods of classifying plants based on a chemical analysis of their products.

1. In botany, the process and methods of classifying plants based on a chemical analysis of their products.
2. Classification of organisms based on differences at the biochemical level, especially in the amino acid sequences of common proteins. Also called chemosystematics.

Of, relating to, or used in chemotherapy.

One who specializes in the treatment of ailments with chemical substances.

1. The treatment of disease, especially of parasitic infections or cancer, by means of chemical substances which act selectively on micro-organisms or malignant tissue.
2. Treatment of disease by means of chemical substances or drugs; usually used in reference to neoplastic disease (a new and abnormal formation of tissue; such as, a tumor or other growth). Also known as, pharmacotherapy.
3. The treatment of a disease with chemicals or drugs; used especially in reference to the treatment of cancer with chemicals.