What is delta?
The word "delta" is borrowed into Russian from Greek (δέλτα). The term is used in various fields of science: in linguistics, geography, mathematics and physics, astronomy.
Let us consider in more detail what a delta is.
- First of all, the delta is the name of the fourthaccount of the Greek alphabet (Δ, δ). It occurs from Phoenician "Dalet" - "door", "entrance to the tent" (by external similarity). It is this letter that is the ancestor of the Latin D and our letter D. In modern Greek, the letter is pronounced as English voiced th (in ancient Greek it was pronounced in the same way as our D).
- The letter δ is used as a symbol fordesignations of variables (together with alpha, beta, gamma) in physics and mathematics. There is also a generalized physical and mathematical Dirac delta function.
- The most famous definition of the delta is part of the landbetween the ramifications of the river at its mouth. This name is associated with the uppercase Greek letter Δ, because delta reminds this letter. An example of the use of the word in this sense: "Malbork is a city in the north of Poland in the Vistula delta" (NM Karamzin).
- Delta is also a colloquial titledeltoid muscle (shoulder muscles), which participates in flexing and extending the arm in the shoulder, drawing the arm to the side. The name, again, is associated with a triangular shape of the muscle, reminiscent of the Greek delta letter.
- Previously, the constellation of the Triangle was called the Delta.
As you can see, all the meanings of the word are somehow related to the Greek letter Δ of a triangular shape. By the way, an aircraft with triangular wings (delta form) is called a hang glider.
The meanings of other equally interesting terms can be found in the Definitions section.