Definition of document type definition in English:

document type definition

Syllabification: doc·u·ment type def·i·ni·tion

Entry from US English dictionary

(abbreviation DTD)

noun

Computing
A template that sets out the format and tag structure of an XML- or SGML-compliant document.

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Word of the day animalcule
Pronunciation: ˌanɪˈmalkjuːl
noun
a microscopic animal