Definition of STD in English:

STD

Line breaks: STD
Pronunciation: /ɛstiːˈdiː
 
/

noun

A sexually transmitted disease.

abbreviation

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1Doctor of Sacred Theology.
[from Latin Sanctae Theologiae Doctor]
1.1British Subscriber trunk dialling.

Definition of STD in:

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Word of the day neoteny
Pronunciation: nēˈätn-ē
noun
retention of juvenile features in the adult animal