Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun delta

3 senses of delta

Sense 1
delta -- (a low triangular area of alluvial deposits where a river divides before entering a larger body of water; "the Mississippi River delta"; "the Nile delta")
       => geological formation, formation -- ((geology) the geological features of the earth)
       => alluvial sediment, alluvial deposit, alluvium, alluvion -- (clay or silt or gravel carried by rushing streams and deposited where the stream slows down)

Sense 2
delta -- (an object shaped like an equilateral triangle)
       => equilateral triangle, equiangular triangle -- (a three-sided regular polygon)

Sense 3
delta -- (the 4th letter of the Greek alphabet)
       => letter, letter of the alphabet, alphabetic character -- (the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters")