noun A semitransparent, uncrystallized silicate mineral and semiprecious stone, presenting various tints in the same specimen, with colors delicately arranged and often curved in parallel alternating dark and light stripes or bands, or blended in clouds; various authorities call it a variety of chalcedony, a variety of quartz, or a combination of the two.
noun The size of type between pearl and nonpareil, standardized as 5+⁄2-point.
noun One fourteenth of an inch.
noun A diminutive person; so called in allusion to the small figures cut in agate for rings and seals.
noun A tool used by gold-wire drawers, bookbinders, etc.;—so called from the agate fixed in it for burnishing.