Noun

(en noun)

One whose activities make use of the scientific method to answer questions regarding the measurable universe. A scientist may be involved in original research, or make use of the results of the research of others.

* {{quote-magazine, date=2012-01

, author=Stephen Ledoux, volume=100, issue=1, page=60, magazine=(American Scientist) , title= Behaviorism at 100 , passage=Becoming more aware of the progress that scientists' have made on behavioral fronts can reduce the risk that other natural ' scientists will resort to mystical agential accounts when they exceed the limits of their own disciplinary training.}}

* {{quote-magazine, date=2013-06-21, author= Karen McVeigh

, volume=189, issue=2, page=10, magazine=(The Guardian Weekly) , title= US rules human genes can't be patented , passage=The US supreme court has ruled unanimously that natural human genes cannot be patented, a decision that scientists and civil rights campaigners said removed a major barrier to patient care and medical innovation.}}

Noun

(en noun)

One who is politically active in the role of a citizen; especially, one who campaigns for change.

*{{quote-magazine, date=2013-08-10, volume=408, issue=8848, magazine=(The Economist)

, title= Can China clean up fast enough? , passage=It has jailed environmental activists and is planning to limit the power of judicial oversight by handing a state-approved body a monopoly over bringing environmental lawsuits.}}

One who is conspicuously active in carrying out any occupational or professional functions.