ND

second, nd

(adjective) coming next after the first in position in space or time or degree or magnitude

nd, twenty-second

(adjective) coming next after the twenty-first in position

nd, thirty-second

(adjective) the ordinal number of thirty-two in counting order

nd, forty-second

(adjective) the ordinal number of forty-two in counting order

neodymium, Nd, atomic number

(noun) a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium

Source: WordNet® 3.1