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DES

(Encyclopedia)DES or diethylstilbestrol dīˌĕthˌəlstĭlbĕsˈtrôl [key], synthetic nonsteroid female sex hormone having the same physiological effects as estrogen. In the 1940s and 50s DES was mistakenly belie...

Cholon

(Encyclopedia)Cholon chōlônˈ, Fr. shôlôNˈ [key], district and former city, since 1932 part of Ho Chi Minh City, Vietnam; on the right bank of the Saigon River, a tributary of the Dong Nai. Cholon is the Chine...

ambivalence

(Encyclopedia)ambivalence ămbĭvˈələns [key], coexistence of two opposing drives, desires, feelings, or emotions toward the same person, object, or goal. The ambivalent person may be unaware of either of the op...

Taussig, Helen Brooke

(Encyclopedia)Taussig, Helen Brooke, 1898–1986, American physician, b. Cambridge, Mass., M.D. Johns Hopkins Univ., 1927. She spent her entire career at Johns Hopkins, where she founded the field of pediatric card...

Ahmed I

(Encyclopedia)Ahmed I äˈmĕd [key], 1589–1617, Ottoman sultan (1603–17), son and successor of Muhammad III to the throne of the Ottoman Empire. The chief event of his reign was the Treaty of Zsitvatorok (1606...

mimicry

(Encyclopedia)CE5 Mimicry in butterflies mimicry, in biology, the advantageous resemblance of one species to another, often unrelated, species or to a feature of its own environment. (When the latter results fr...

Merian, Maria Sibylla

(Encyclopedia)Merian, Maria Sibylla märēˈä zĭbüˈlä māˈrēän [key], 1647–1717, German naturalist, entomologist, and painter of insects and flowers, b. Frankfurt; daughter of Matthäus Merian, the elder....

Asian carp

(Encyclopedia)Asian carp, term for several large, hardy freshwater fish of the family Cyprinidae (the minnow family) that are native to E Asia and have become invasive species in the United States. The fish, which ...

hammerhead shark

(Encyclopedia)hammerhead shark, active, surface-living shark, genus Sphyrina. Its curious head has lateral projections resembling the crossbar of a T, and its eyes and ears are located in the outer tips of the proj...

insectivore

(Encyclopedia)insectivore ĭnsĕkˈtəvōrˌ [key], term broadly given to any insect-eating animal or plant. The term also refers to mammals of the former order Insectivora, in which was included the shrew, mole, h...