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Calvert, George, 1st Baron Baltimore

(Encyclopedia)Calvert, George, 1st Baron Baltimore, c.1580–1632, English colonizer of North America. In 1606 he became private secretary to Robert Cecil, earl of Salisbury, then a secretary of state. His advance ...

vascular bundle

(Encyclopedia)vascular bundle, in botany, a strand of conducting tissue extending lengthwise through the stems and roots of higher plants, including the ferns, fern allies, gymnosperms, and angiosperms. The vascula...

herbaceous plant

(Encyclopedia)herbaceous plant hûrbāˈshəs [key], plant whose stem is soft and green and shows little growth of wood. The term is used to distinguish such plants from woody plants. Herbaceous plants, or herbs, a...

Maine, University of

(Encyclopedia)Maine, University of, main campus at Orono; coeducational; land-grant and state supported; chartered 1865 as Maine State College of Agriculture and the Mechanic Arts, opened 1868, renamed 1897. There ...

Massachusetts, University of

(Encyclopedia)Massachusetts, University of, main campus at Amherst; land-grant and state supported; coeducational; chartered 1863, opened 1867 as Massachusetts Agricultural College. It was called Massachusetts Stat...

Tithonus

(Encyclopedia)Tithonus tĭthōˈnəs [key], in Greek mythology, prince of Troy; son of Laomedon. He was loved by the dawn goddess, Eos, who bore him Memnon. When Eos begged Zeus to bestow immortality upon Tithonus,...

Nebraska, University of

(Encyclopedia)Nebraska, University of, main campus at Lincoln; land-grant and state supported; coeducational; chartered 1869, opened 1871, reorganized 1968. The university has an excellent archaeological museum and...

ash, in chemistry

(Encyclopedia)ash, in chemistry, solid residue of combustion. The chemical composition of an ash depends on that of the substance burned. Wood ash contains metal carbonates (e.g., potassium carbonate) and oxides fo...

sapwood

(Encyclopedia)sapwood, relatively thin, youngest, outer part of the woody stem of a tree, the part that conducts water and dissolved materials. In the cross section of a tree, the sapwood is recognizable by its tex...

centering

(Encyclopedia)centering, the framework of wood or of wood and steel built to support a masonry arch or vault during its construction. The centering itself must be rigidly supported, either by posts from the ground ...