ag-, agen-, act-, agi-, agit-

(Latin: to set in motion, to hurry, to shake; to drive; to do, to act; to lead, to conduct, to guide)

A medicine that prevents or retards the clotting of blood.
1. Qualitative, or quantitative, analysis of a substance; especially, of an ore or drug, to determine its components; a substance to be so analyzed or the result of such an analysis.
2. An analysis or examination.
3. To examine by trial or experiment; to put to a test.
An analyst who assays (performs chemical tests on) metals.
1. Determination of the potency or concentration of a compound by its effect upon animals, isolated tissues, or microorganisms, as compared with an analysis of its chemical or physical properties.
2. An experimental technique for measuring quantitatively the strength of a biologically active chemical by its effects on a living organism.
3. Using living organisms to measure the quantity and effect; especially, toxic effect, of a substance, factor, or condition.
  • The vitamin activity of certain substances can be measured using bacterial cultures.
  • The increase in bacterial numbers is compared against that achieved with known standards for vitamins.
  • Plant growth hormones can be estimated by their effect in causing curvature of oat coleoptiles (a sheathlike structure that protects the developing plumule [first rudimentary leaves in the mature embryo and seedling] in grasses).
1. A microorganism that, through its biochemical reactions, can produce medically or commercially useful materials, e.g., beer from fermentation of yeast or insulin from genetically altered bacteria.
2. A living cell culture genetically engineered to produce materials useful for research in biology, medicine, and industrial processes.
3. A large tank for growing microorganisms used in industrial production.
In surgery, the coagulation of tissue by applying chemicals.
circumagitate (verb), circumagitates; circumagitated; circumagitating
To agitate around on all sides.
circumagitation (s) (noun), circumagitations (pl)
The act of moving or stirring around or about.
To shake or to mix together.
1. An agent that produces coagulation or which converts a fluid or a substance that is in a solution into a solid or gel.
2. An agent that causes, stimulates, or accelerates coagulation, especially with reference to blood.
3. Etymology: from Middle French coaguler, from Ltin coagulatus, past participle of coagulare, "to cause to curdle"; from cogere, "to curdle, to collect"; from com-, "together" + agere "to drive".