\Tet`ra*gram"ma*ton\, n. [NL., fr. Gr. ?; te`tra-
(see {Tetra-}) + ? a letter.]
The mystic number four, which was often symbolized to
represent the Deity, whose name was expressed by four letters
among some ancient nations; as, the Hebrew JeHoVaH, Greek
qeo`s, Latin deus, etc.