Glossary

c
calcareoussearch for term
Resembling calcite or calcium carbonate, especially in hardness. Growing on limestone or in soil with lime.
cationicsearch for term
Relating to a positively charged ion.
cautionsearch for term
The signal word used on labels of slightly toxic or relatively nontoxic pesticides.
certified applicatorsearch for term
A person who has demonstrated through an examination process the ability to safely handle and apply restricted use pesticides.
chemical namesearch for term
The official name given to a chemical compound to distinguish it from other chemical compounds.
chlorophyllsearch for term
Green, light-absorbing molecules inside the chloroplasts of algae and green plants.
chloroplastssearch for term
Chlorophyll-containing plastids found in algal and green plant cells.
cholorophyllsearch for term
The green photosynthetic pigment found chiefly within plants.
chronic exposuresearch for term
Repeated low level exposures over an extended period of time. Aside from mortality, health effects can be reported in terms of reproductive harm and cancer risk.
colorsearch for term
Refers to the presence of dissolved organic materials (humic acids from decaying leaves) and also dissolved minerals, which can give water a reddish-brown or “tea” color. In some cases, these substances can make the water appear almost black.
common namesearch for term
The recognized, nonscientific name given to pesticides.
contact herbicidesearch for term
A herbicide that causes injury to plant tissue where contact occurs.
contact timesearch for term
Duration of herbicide exposure to the plant.
contaminantssearch for term
Substances that potentially threaten water quality such as; human and animal bacteria, pesticides, fertilizers, fuel spills, and other pollutants.
convectional mixingsearch for term
mixing of water due to changes in temperature (e.g., surface water cools and sinks at night). Water is constantly moving and mixing even on days with no wind.