haplodiploid
Concise Oxford English Dictionary © 2008 Oxford University Press:
haplodiploid /ˌhaplə(ʊ)ˈdɪplɔɪd/
▶adjective Biology denoting or possessing a genetic system in which females develop from fertilized (diploid) eggs and males from unfertilized (haploid) ones.
'haplodiploid' also found in these Oxford entries:

