There are 2 definitions of Dy in English:

Dy1

Line breaks: Dy

symbol

The chemical element dysprosium.

Definition of Dy in:

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Word of the day humoresque
Pronunciation: ˌhjuːməˈrɛsk
noun
a short, lively piece of music

There are 2 definitions of Dy in English:

DY2

Line breaks: DY

abbreviation

Benin (international vehicle registration).

Origin

from Dahomey.