EAST n.
Formerly, the part of the United States east of the Alleghany Mountains, esp. the Eastern, or New England, States; now, commonly, the whole region east of the Mississippi River, esp. that which is north of Maryland and the Ohio River; -- usually with the definite article; as, the commerce of the East is not independent…
EQUATORIAL n.
An instrument consisting of a telescope so mounted as to have two axes of motion at right angles to each other, one of them parallel to the axis of the earth, and each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed,…