Where does “deltaic” come from?

Deltaic derives from delta, which comes from Ancient Greek δέλτα, ultimately from Proto-Indo-European -kos, a suffix forming adjectives.

deltaic (English): Of or pertaining to a river delta; Shaped like...

Definitions

  1. Of or pertaining to a river delta; Shaped like...

Ancestry of “deltaic”, step by step

deltaic traces back through 3 separate lines of ancestry.

via French deltaïque

StepLanguageWordMeaning
1Frenchdeltaïquedeltaic; delta
2French-iqueUsed to form adjectives from nouns: -ic, -ical,...
3Middle French-iqueic
4Old French-ique-ic
5Latin-icusbelonging to; derived from; of or pertaining to;...
6Proto-Italic*-ikosforms adjectives with the sense of 'of or pertaining to'

via English Delta

StepLanguageWordMeaning
1EnglishDeltaThe Delta variant of COVID-19
2Greekδέλταdelta, the fourth letter of the modern Greek...
3Ancient Greekδέλτᾰdelta

via English ic

StepLanguageWordMeaning
1Englishicrelated or pertaining to; having the character of

Words derived from “deltaic

Every word from Proto-Italic *-ikos