delta

¹del·ta

noun \ˈdel-tə\

Definition of DELTA

1

: the 4th letter of the Greek alphabet — see alphabet table

2

: something shaped like a capital Greek delta; especially : the alluvial deposit at the mouth of a river

3

: an increment of a variable —symbol Δ

4

: delta wave

— del·ta·ic \del-ˈtā-ik\ adjective

Origin of DELTA

Middle English deltha, from Greek delta, of Semitic origin; akin to Hebrew dāleth daleth

First Known Use: 13th century

Other Geology Terms

anthracite, boulder, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale