plural d's or ds
ˈdēz 
often capitalized, often attributive
1
a
: the 4th letter of the English alphabet
Her middle initial is d.
b
: a graphic representation of this letter
a half moon in the shape of a d
c
linguistics
: the speech sound that the written letter d represents : a speech counterpart of orthographic d
2
Roman numerals
: five hundred see Table of Numbers
3
music
: the second tone of a C-major scale (see scale entry 5 sense 1)
in the key of d
4
: a graphic device for reproducing the letter d
the d on my computer keyboard
5
: one designated d especially as the fourth in order or class
option d
6
education
a
: a grade rating a student's work as poor in quality
got a d on the test
b
: one graded or rated with a D
7
: something shaped like the letter D
specifically
: a semicircle on a pool table about 23 inches in diameter for use especially in snooker
8
1
date
2
daughter
3
day
4
dead; deceased
5
deci-
6
degree
7
[Latin denarius, denarii]
penny; pence
8
depart; departure
9
diameter
10
differential
11
dimensional
12
distance
13
dorsal
14
down (see down entry 5 sense 6)
15
drive; driving
1
Democrat
2
derivative
3
dollar
4
Dutch
deuterium
ˌdē,
ˈdē
1
: dextrorotatory
d-tartaric acid
2
: having a similar configuration at a selected carbon atom to the configuration of dextrorotatory glyceraldehyde
—usually printed as a small capital
d-fructose
—used after the figure 2 or 3 to indicate the ordinal number second or third
2d
53d
Dictionary Entries Near d
Cite this Entry
“D.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/d. Accessed 22 Nov. 2024.
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