BioScience Dictionary

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Ot.

Found EST 11 times.

Displaying results 1 to 10.

1. EST
Expressed Sequence Tag. See sequence tagged site .

2. Established cell line
A stable culture of cell s that can be maintained indefinitely. A lineage of cells that has become immortalized.

3. Ester
* A general term for any organic molecule produced by combining an acid with an alcohol . * A derivative of carboxylic acid ( acid with a carboxyl group -COOH) which has the general formula RCOOR, where the R's stand for the same or different aliphatic groups (alkyl groups), aromatic groups (aryl groups), or hydrogen ions.

4. Esterase
An enzyme that breaks ester linkages, especially the ones found in nucleic acid s ( phosphodiester bond s) and lipid s.

5. Estero
Spanish for "estuary." The area where the waters of a river or stream mingle with the ocean into which it flows.

6. Estivation (aestivation)
In zoology, a dormant state involving vastly lowered metabolism which certain animals enter in order to survive hot weather. * In botany, refers to the arrangement of sepal s and petals or their lobes in an unexpanded flower bud. Compare vernation .

7. Estradiol
Estradiol is the principal estrogen produced by the ovary .

8. Estrogen (pl. estrogens)
A steroid sex hormone that regulates female reproductive processes and creates feminine secondary sexual characteristics. Some types of cancer depend on estrogen for their growth, and modern-day increases in cancer rates are thought by many to be caused by the action of certain chlorinated organic chemicals (such as pesticide s and herbicide s) that mimic the action of this hormone.

9. Estrogen
A female sex hormone that performs many important functions in reproduction.

10. Estrus cycle (estrous cycle)
A reproductive cycle in some female mammals (but not female humans, who instead have menstrual cycle s). The cycle is characterized by a short period of intense sexual desire (called estrus or heat) when the animal is fertile, which often occurs only once or twice a year, and involves correlating physical changes of the reproductive tract.


View web definitions »

Learn more about EST »