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aquatint

(Encyclopedia)aquatint äˈkwətĭntˌ [key], etching technique. The plate is covered with a porous ground, or resist, through which acid bites many tiny pockmarks in the metal. If an area is to be completely white...

mezzotint

(Encyclopedia)mezzotint mĕtˈsətĭnt, mĕdˈzə–, mĕzˈə– [key] [Ital.,=halftint], method of copper or steel engraving in tone. A Dutch officer, Ludwig von Siegen, is given credit for the invention of mezzo...

Millar, John

(Encyclopedia)Millar, John, 1735–1801, Scottish philosopher and historian. Millar studied at Glasgow, where he became the chief disciple of Adam Smith. In 1761 Millar became professor of civil law at Glasgow, and...

cabbage looper

(Encyclopedia)cabbage looper, moth larva, Trichoplusia ni, that feeds by night on the leaves of cabbage and related plants and is a serious agricultural pest. Like the inchworms (of another moth family), cabbage lo...

bloodletting

(Encyclopedia)bloodletting, also called bleeding, practice of drawing blood from the body in the treatment of disease. General bloodletting consists of the abstraction of blood by incision into an artery (arterioto...

tendril

(Encyclopedia)tendril, slender, sensitive structure of many climbing plants that by a response to contact (see auxin) supports the plant. Tendrils are modified stems, leaves, or leaf parts or roots. Most young tend...

Basedow, Johann Bernhard

(Encyclopedia)Basedow, Johann Bernhard yōhänˈ bĕrnˈhärt bäˈzədō [key], 1723–90, German educator, b. Hamburg, educated in Hamburg and at the Univ. of Leipzig. Later he taught in Denmark (1753) and German...

Caylus, Anne Claude Philippe de Tubières, comte de

(Encyclopedia)Caylus, Anne Claude Philippe de Tubières, comte de än klōd fēlēpˈ də tübyĕrˈ kôN də kālüsˈ [key], 1692–1765, French archaeologist and antiquarian. Caylus learned drawing from Watteau....

Cleary, Beverly

(Encyclopedia)Cleary, Beverly, 1916–2021, American children's books author, b. McMinnville, Ore. as Beverly Atlee Bunn, Univ. of California, Berkeley (BA, 1938) . S...

Gray, Elisha

(Encyclopedia)Gray, Elisha, 1835–1901, American inventor, b. Barnesville, Ohio. He patented many electrical devices, most of them having to do with the telegraph. His telautograph (1888) for transmitting handwrit...