delta
/ˈdɛltə/ noun, verb, proper noun
Forms deltas deltaing deltaed
- noun The fourth letter of the modern Greek alphabet Δ, δ.
- noun A landform at the mouth of a river where it empties into a body of water. “Nile Delta”
- noun (mathematics, physics, engineering) The symbol Δ; A change in a quantity, likely from "d" for "difference". “ΔV - "delta vee"(change in velocity, used in rocketry and orbital mechanics)”
- noun (finance) The rate of change in an option value with respect to the underlying asset's price.
- noun (chemistry) A value in delta notation indicating the relative abundances of isotopes.
- noun (computing) The set of differences between two versions of a file. “When you update the file, the system will only save the deltas.”
- noun (computing, informal) A small but noticeable effect. Compare epsilon. “This will slow the main code path down, but only by delta.”
- noun (surveying) The angle subtended at the center of a circular arc.
- verb (cryptography) To calculate the differences between the characters in an enciphered text and the characters a fixed number of positions previous.
- verb (computing) To compare two versions of the same file in order to determine where they differ (where a programmer has made edits).
- proper noun A state of Nigeria in the South South geopolitical zone. Capital: Asaba. Largest city: Warri.
- proper noun A municipality in Central Macedonia, Greece.
- proper noun A municipality of Minas Gerais, Brazil.
- proper noun A municipality of British Columbia, Canada.
- proper noun A village in Ontario, Canada.
- proper noun A census-designated place and unincorporated community in Clay County, Alabama.
- proper noun A city and home rule municipality, the county seat of Delta County, Colorado.
- proper noun An unincorporated community in Saline County, Illinois.
- noun The Delta variant of COVID-19.
Synonyms
Etymology
From Ancient Greek δέλτα (délta), borrowed from a Phoenician word for "door", ultimately from Proto-Semitic *dalt-. Doublet of dalet.
* (river): from the triangular shape of the majuscule Greek letter delta Δ
* (USSF): from the delta wing, symbol of the USSF, a triangular wing, shaped like the majuscule Greek letter delta Δ
Webster’s 1913
- noun A tract of land shaped like the letter delta (as, the delta of the Ganges, of the Nile, or of the Mississippi.
- noun One of the usual forms or methods for connecting apparatus to a three-phase circuit, the three corners of the delta or triangle, as diagrammatically represented, being connected to the three wires of the supply circuit.
Etymology [Gr. Delta of the Nile.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “delta”, CC BY-SA 4.0. Details