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Darwin, Charles Robert

(Encyclopedia)Darwin, Charles Robert, 1809–82, English naturalist, b. Shrewsbury; grandson of Erasmus Darwin and of Josiah Wedgwood. He firmly established the theory of organic evolution known as Darwinism. He st...

Hyatt, Alpheus

(Encyclopedia)Hyatt, Alpheus, 1838–1902, American zoologist, b. Washington, D.C., grad. Harvard, 1862. He was a devoted follower of Louis Agassiz. From 1870, Hyatt was custodian and later curator of the Boston So...

lexicography

(Encyclopedia)lexicography, the applied study of the meaning, evolution, and function of the vocabulary units of a language for the purpose of compilation in book form—in short, the process of dictionary making. ...

Alexander, Samuel

(Encyclopedia)Alexander, Samuel, 1859–1938, British philosopher, b. Australia. From 1893 to 1924 he was professor of philosophy at Victoria Univ., Manchester. Strongly influenced by the theory of evolution, Alexa...

Lankester, Sir Edwin Ray

(Encyclopedia)Lankester, Sir Edwin Ray lăngˈkəstər [key], 1847–1929, English zoologist. He was a professor at University College, London (1874–90) and Oxford (1891–98) and was director of the natural hist...

Simons, Walter

(Encyclopedia)Simons, Walter välˈtər zēˈmôns [key], 1861–1937, German jurist and statesman. He served (1919) as commissioner general to the German delegation at Versailles, but resigned in opposition to the...

Roux, Wilhelm

(Encyclopedia)Roux, Wilhelm ro͞o [key], 1850–1924, German anatomist, a founder of experimental embryology. He was a pupil of Ernst Haeckel and a professor (1895–1921) at the Univ. of Halle. In his studies of ...

Darwin's finches

(Encyclopedia)Darwin's finches or Galapagos finches gəläˈpəgōsˌ [key], species of small perching birds, constituting the subfamily Geospizinae of the tanager family. Not related to the true finches, this grou...

extinction

(Encyclopedia)extinction, in biology, disappearance of species of living organisms. Extinction usually occurs as a result of changed conditions to which the species is not suited. If no member of the affected speci...

Beecher, Henry Ward

(Encyclopedia)Beecher, Henry Ward, 1813–87, American Congregational preacher, orator, and lecturer, b. Litchfield, Conn.; son of Lyman Beecher and brother of Harriet Beecher Stowe. He graduated from Amherst in 18...