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This symbol is used to indicate the diameter of a circular section; for example, "⌀14" means the diameter of the circle is 14 units. A clock signal in electronics is often called Phi or uses the symbol. In emulsion and suspension science, Φ often denotes the volume fraction of the dispersed phase. Archaically used in chemistry for phenyl group.
Plus–minus sign. The plus–minus sign, ±, is a symbol with multiple meanings: In mathematics, it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction. In statistics and experimental sciences, the sign commonly indicates the confidence interval or uncertainty ...
Science is a rigorous, systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the world. Modern science is typically divided into three major branches: the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; the social sciences (e.g., economics, psychology, and sociology), which study individuals ...
In Chinese mysticism, the classical element "Earth" is represented by the trigram of three broken lines in the I Ching (☷). [6] The Western (early modern) alchemical symbol for earth is a downward-pointing triangle bisected by a horizontal line (🜃). [7] Other symbols for the earth in alchemy or mysticism include the square and the serpent.
The Vergina Sun (also known as the Star of Vergina, Macedonian Star, or Argead Star) is a rayed solar symbol appearing in ancient Greek art from the 6th to 2nd centuries BC. The Vergina Sun appears in art variously with sixteen, twelve, or eight triangular rays. Bianchini's planisphere, produced in the 2nd century, [5] has a circlet with rays ...
The micrometre (Commonwealth English) as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American English), also commonly known by the non-SI term micron, is a unit of length in the International System of Units (SI) equalling 1 × 10 −6 metre (SI standard prefix "micro-" = 10 −6); that is, one millionth of a metre (or one thousandth of a millimetre ...
Gold is a chemical element with the symbol Au (from the Latin word aurum) and the atomic number 79. In its pure form, it is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals.
Mathematical operators and symbols are in multiple Unicode blocks. Some of these blocks are dedicated to, or primarily contain, mathematical characters while others are a mix of mathematical and non-mathematical characters. This article covers all Unicode characters with a derived property of "Math". [2] [3]