4. (Arch.) A pointed projection, like a four-sided pyramid, used for ornament in lines or groups.
5. (Baseball) The infield; the square space, 90 feet on a side, having the bases at its angles.
6. (Print.) The smallest kind of type in English printing, except that called brilliant, which is seldom seen.
This line is printed in the type called Diamond.
Black diamond, coal; (Min.) See Carbonado. -- Bristol diamond. See Bristol stone, under Bristol. -- Diamond beetle (Zoöl.), a large South American weevil (Entimus imperialis), remarkable for its splendid luster and colors, due to minute brilliant scales. -- Diamond bird (Zoöl.), a small Australian bird (Pardalotus punctatus, family Ampelidæ.). It is black, with white spots. -- Diamond drill (Engin.), a rod or tube the end of which is set with black diamonds; -- used for perforating hard substances, esp. for boring in rock. -- Diamond finch (Zoöl.), a small Australian sparrow, often kept in a cage. Its sides are black, with conspicuous white spots, and the rump is bright carmine. -- Diamond groove (Iron Working), a groove of V-section in a roll. -- Diamond mortar (Chem.), a small steel mortar used for pulverizing hard substances. - - Diamond-point tool, a cutting tool whose point is diamond-shaped. -- Diamond snake (Zoöl.), a harmless snake of Australia (Morelia spilotes); the carpet snake. -- Glazier's diamond, a small diamond set in a glazier's tool, for cutting glass.
Di"a*mond (?; 277), a. Resembling a diamond; made of, or abounding in, diamonds; as, a diamond chain; a diamond field.
Di"a*mond-back` (?), n. (Zoöl.) The salt-marsh terrapin of the Atlantic coast (Malacoclemmys palustris).
Di"a*mond*ed, a. 1. Having figures like a diamond or lozenge.