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sea fan

(Encyclopedia)sea fan, colonial marine animal forming erect, flattened, branching colonies in tropical and subtropical waters. Colonies may be several feet high and are often colorful, with purples, reds, and yello...

acquired characteristics

(Encyclopedia)acquired characteristics, modifications produced in an individual plant or animal as a result of mutilation, disease, use and disuse, or any distinctly environmental influence. Some examples are docki...

Bella, Stefano della

(Encyclopedia)Bella, Stefano della stāfäˈnō dĕlˈlä bĕlˈlä [key], 1610–64, Italian engraver, b. Florence. First copying the manner of Jacques Callot, his style changed somewhat when he traveled to Rome, ...

cautery

(Encyclopedia)cautery, searing or destruction of living animal tissue by use of heat or caustic chemicals. In the past, cauterization of open wounds, even those following amputation of a limb, was performed with ho...

clone

(Encyclopedia)clone, group of organisms, all of which are descended from a single individual through asexual reproduction, as in a pure cell culture of bacteria. Except for changes in the hereditary material that c...

Jennings, Herbert Spencer

(Encyclopedia)Jennings, Herbert Spencer, 1868–1947, American zoologist, b. Tonica, Ill., B.S. Univ. of Michigan, 1893, Ph.D. Harvard, 1896. He was professor of zoology at Johns Hopkins (1906–10) and did researc...

harvestman

(Encyclopedia)harvestman, arachnid, often called daddy longlegs because of its eight long, slender legs. The harvestman has a rounded or oval body possessing glands that give off an acrid scent. Its food consists o...

Hatch, William Henry

(Encyclopedia)Hatch, William Henry, 1833–96, U.S. Congressman (1879–95), b. Scott co., Ky. He was admitted (1854) to the bar and moved to Hannibal, Mo. He became prominent in Democratic politics in Missouri and...

Hales, Stephen

(Encyclopedia)Hales, Stephen, 1677–1761, English physiologist and clergyman. From 1709 he was perpetual curate of Teddington. His experimental studies in animal and plant physiology contributed greatly to the pro...

fuchsin

(Encyclopedia)fuchsin məjĕnˈtə [key], bright red dyestuff consisting of the mixed hydrochlorides or acetates of rosaniline and pararosaniline. It is composed of small crystals possessing a brilliant green sheen...