christcross

from The Century Dictionary.

• noun The mark of the cross cut, printed, or stamped on any object.
• noun The beginning and end; the Alpha and Omega: probably from the sign of the cross being prefixed and appended to serious literary undertakings, inscriptions on sepulchral monuments, etc. See christcross-row.

from the GNU version of the Collaborative International Dictionary of English.

• noun The mark of the cross, as cut, painted, written, or stamped on certain objects, -- sometimes as the sign of 12 o'clock on a dial.
• noun obsolete The beginning and the ending.