CIPHER n.
A private alphabet, system of characters, or other mode of writing, contrived for the safe transmission of secrets; also, a writing in such characters. His father . . . engaged him when he was very young to write all his letters to England in cipher. Bp. Burnet. Cipher key, a key to assist in reading writings in cipher…
CLEAVAGE n.
entation. -- Lateral cleavage, cleavage parallel to the lateral planes. -- Octahedral, Dodecahedral, or Rhombohedral, cleavage, cleavage parallel to the faces of an octahedron, dodecahedron, or rhombohedron. -- Prismatic cleavage, cleavage parallel to a vertical prism.
CLICHE n.
late or any similar reproduction of ornament, or lettering, in relief. Cliché casting, a mode of obtaining an impression from a die or woodcut, or the like, by striking it suddenly upon metal which has been fused and is just becoming solid; also, the casting so obtained.
CLOG n.
Chopine. In France the peasantry goes barefoot; and the middle sort . . . makes use of wooden clogs. Harvey. Clog almanac, a primitive kind of almanac or calendar, formerly used in England, made by cutting notches and figures on the four edges of a clog, or square piece of wood, brass, or bone; -- called also a Runic…