DTD

¹

abbreviation for

1. document type definition: a description of the different types of elements and markup tags allowable in a particular SGML, XML, or HTML document and where they can occur within the document.

d.t.d.

²

abbreviation for

1. (in prescriptions) give such doses.

Word History and Origins

Origin of DTD¹

First recorded in 1980–85

Origin of DTD²

From Latin dentur tālēs dosēs