From WordNet (r) 2.0 (August 2003) [wn]:
2d
adj : coming next after the first in position in space or time or
degree or magnitude [syn: second, 2nd]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
2d \2d\ 2nd \2nd\adj.
1. coming next after the first in position in space or time
or degree or magnitude
Syn: second, 2nd
[WordNet 1.5 +PJC]