td

Td is a two-letter symbol used as an abbreviation in several domains, and its meaning depends on the context. The most widely recognized uses span sports, computing, immunization, finance, and chemistry.

In sports, TD stands for touchdown, a scoring play in American and Canadian football that yields six points. After scoring, teams typically attempt an extra point or a two-point conversion.

In computing and the web, td is the HTML tag for a table data cell. The td element, short for table data, appears within a table row (tr) to hold individual data cells and is closed with </td>.

In medicine, Td refers to the tetanus and diphtheria toxoid vaccine. This booster is used in adults and older children to maintain protection against tetanus and diphtheria; a related formulation, Tdap, also covers pertussis.

In banking and finance, TD can denote a time- or term-deposit (time deposit). This product is common in various countries. The Toronto-Dominion Bank, a major Canadian financial institution, is often abbreviated as TD and trades under the ticker TD on several stock exchanges, including the New York Stock Exchange and the Toronto Stock Exchange.

In chemistry and crystallography, Td denotes the tetrahedral point group, describing the symmetry of molecules with tetrahedral geometry, such as methane, or of certain crystals. The Td group captures the full set of rotational and reflection symmetries of a tetrahedron.

Other uses exist in branding, transportation, and language contexts, but the items above cover the most widely recognized meanings of Td.