Look up ∂ in Wiktionary, the free dictionary.

∂ or is a mathematical symbol often read as "der", "dow", "die" or "partial", used to denote the following:

• The boundary of a set in topology.
• A partial derivative, such as that would be read as "the partial derivative of z with respect to x is 3"

In Unicode character set, this symbol has the codepoint U+2202 and is part of the Mathematical Operators range. In HTML, this symbol has the character entity ∂ .

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