DEAD-EYE n.
A round, flattish, wooden block, encircled by a rope, or an iron band, and pierced with three holes to receive the lanyard; -- used to extend the shrouds and stays, and for other purposes. Called also deadman's eye. Totten.
DECIMAL n.
f tens; specifically, and almost exclusively, used as synonymous with a decimal fraction. Circulating, or Circulatory, decimal, a decimal fraction in which the same figure, or set of figures, is constantly repeated; as, 0.354354354; -- called also recurring decimal, repeating decimal, and repetend.
DECLINATION n. 2 definitions
The arc of the horizon, contained between the vertical plane and the prime vertical circle, if reckoned from the east or west, or between the meridian and the plane, reckoned from the north or south.