1D
See also:
1-D
,
1d
,
and
1/d
English
Adjective
1D
(
not comparable
)
Abbreviation of
one-dimensional
.
Coordinate terms:
2D
,
3D
,
4D
Noun
1D
(
plural
1Ds
)
(
American football
)
Initialism of
first down
.
Proper noun
1D
The British
boy band
One Direction
.
Derived terms
1Der