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d.a.
D and C
D/D
D-day
D/F
D.H.
D.J.
D/L
D layer
D-notice
D/O
d’oh
D/P
D region
d.s.
D-sleep
d-tartaric acid
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D (2)

D


symbol 
Definition:
 
1. chemistry deuterium

2. optics dioptre

3. physics dispersion

4. aerospace drag

5. mathematics used to refer to the first derivative of a function

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