From WordNet (r) 3.0 (2006) [wn]:
condo
n 1: one of the dwelling units in a condominium [syn:
condominium, condo]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
condo \con"do\ n.
one of the units in a condominium.
Syn: condominium.
[WordNet 1.5]