Found in the following dictionaries
TWL06 (NASPA List 2006)
"D" Definition
noun
Any of the speech sounds represented by the letter d.
Source: American Heritage Dictionary
Music A key or scale in which D is the tonic.
Source: American Heritage Dictionary
Music A string, key, or pipe tuned to the pitch of this tone.
Source: American Heritage Dictionary
Music A written or printed note representing this tone.
Source: American Heritage Dictionary
Music The second tone in the scale of C major or the fourth tone in the relative minor scale.
Source: American Heritage Dictionary
abbreviation
Deuteron.
Source: American Heritage Dictionary
Diameter.
Source: American Heritage Dictionary
Differential.
Source: American Heritage Dictionary
Down quark.
Source: American Heritage Dictionary
Democrat.
Source: Merriam-Webster
symbol
Deuterium.
Source: Merriam-Webster
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