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Science & Tech > Mathematics > Symbols


Now updated for CSW15. New words, if any, and new inflections of existing words, are shown in red.


apostrophus (Lat.) the backwards C symbol used in Roman numerals.
del a mathematical symbol, aka nabla.
lemniscate an oval shape with two symmetrical loops across a central node (as the figure 8), used as the symbol for infinity.
nabla (Greek) in Cartesian coordinates, an inverted delta, also called del, representing a vector operator.
operator a symbol that represents a mathematical function.
operatorless without an operator.
placeholder a symbol in a mathematical or logical expression that may be replaced by the name of any element of a set.
singulary of an operator, monadic.
vincular of or like a vinculum, a unifying bond.
vinculum (Lat.) a horizontal line placed above a part of an equation, etc, equivalent to brackets.