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biology

(Encyclopedia)biology, the science that deals with living things. It is broadly divided into zoology, the study of animal life, and botany, the study of plant life. Subdivisions of each of these sciences include cy...

bog

(Encyclopedia)bog, very old lake without inlet or outlet that becomes acid and is gradually overgrown with a characteristic vegetation (see swamp). Peat moss, or sphagnum, grows around the edge of the open water of...

serum sickness

(Encyclopedia)serum sickness, hypersensitive response that occurs after injection of a large amount of foreign protein. The condition is named for the serum taken from horses or other animals immunized against a pa...

pigment

(Encyclopedia)pigment, substance that imparts color to other materials. In paint, the pigment is a powdered substance which, when mixed in the liquid vehicle, imparts color to a painted surface. The pigments used i...

Troubetzkoy, Paul, Prince

(Encyclopedia)Troubetzkoy, Paul, Prince tro͞obĕtskoiˈ, tro͞obĕtsˈkoi, Rus. tro͞obyĭtskoiˈ [key], 1866–1938, Russian sculptor, b. Italy. The son of a Russian nobleman and an American woman, Troubetzkoy wo...

Cephalus

(Encyclopedia)Cephalus sĕˈfäləs [key], in Greek mythology, husband of Procris. The two swore eternal fidelity, but Eos, who had fallen in love with Cephalus, persuaded him to test his wife. Cephalus disguised h...

Potter, Beatrix

(Encyclopedia)Potter, Beatrix, 1866–1943, English author and illustrator. She published her first animal stories, The Tale of Peter Rabbit (1902) and The Tailor of Gloucester (1903), at her own expense before she...

Richet, Charles Robert

(Encyclopedia)Richet, Charles Robert shärl rōbĕrˈ rēshāˈ [key], 1850–1935, French physiologist. From 1887 to 1927 he was professor at the Univ. of Paris. His special study was anaphylaxis, a term he used t...

Oudry, Jean Baptiste

(Encyclopedia)Oudry, Jean Baptiste zhäN bätēstˈ o͞odrēˈ [key], 1686–1755, French animal painter. A pupil of Largillière, he became court painter to Louis XV, recording the king's hunts in his paintings an...

charcoal

(Encyclopedia)charcoal, substance obtained by partial burning or carbonization (destructive distillation) of organic material. It is largely pure carbon. The entry of air during the carbonization process is control...