Main Entry: tet·ra·gram·ma·ton

Pronunciation: \ˌte-trə-ˈgra-mə-ˌtän\

Function: noun

Etymology: Middle English, from Late Latin, from Greek, from neuter of tetragrammatos having four letters, from tetra- + grammat-, gramma letter — more at gram

Date: 15th century

: the four Hebrew letters usually transliterated YHWH or JHVH that form a biblical proper name of God — compare yahweh